Re: Plate blocking caps YC156
Hi Dave,
???? Glad you mentioned about the KVI type russian doorknobs as supplies are still around and I did get a few through the post recently. Also K15-5 type 6.3kV ceramics (proof tested to 9kV so ufb for some jobs) for some other purposes around the tubes and PSU. High KVAR ratings still attract a good price and of course they're a good size too, but worth snapping a pair up before they're all gone. Was going to mention it last night, but as it's my first post was rather hesitant, however I've broke the duck now.
There is some data around very well worth a search for on them.
73 All, reading the thread with interest (am still building and fixing tube amps)
Adam G0ORY
On Sun, Mar 22, 2020 at 1:32 PM DAVE WHITE via Groups.Io <mausoptik= [email protected]> wrote:
Hi Tracey - I used one of these in my 3CX3000 amp
Mine's a 2000pF rated at 20kV.? I have seen them on Ebay for about a tenner - a lot cheaper than the ceramic one you were looking at which I think was ?50.? I'd bought the big ceramic caps in the past off Mr Jandek at Friedrichshafen (a big stand in the fleamarket with Russian vacuum capacitors etc, usually on the back wall - remember him?)? for about 10 euros.? He wasn't there last year (and who knows what will happen this year?)? but he might still be in business.? He was based in Bielefeld last I heard.
I can only state (rather unscientifically) that I haven't blown it up yet.? ?I also use one of the plastic LCC caps as a matching series capacitor on my ground-level fed 3/8 wave wibbly-wonky-sort-of-inverted-L on 160m.? ?The only time I damaged that was when I inadvertently reversed the Land Rover over the feedpoint.? I can't blame RF current for that, only clumsy driving.
Something similar
Alternatively how about getting in touch with Alex UR4LL?? He's a thoroughly reliable chap and will almost certainly have a Russian made equivalent of the ceramic capacitors you mentioned - at a pretty good price from what I remember.
Hope that helps
73
Dave G0OIL
On Saturday, 21 March 2020, 23:04:52 GMT, Tracey Gardner via Groups.Io <tracey.gardner= [email protected]> wrote:
?
Having looked at the Draloric data sheet for the 2500pf, R85, PE 200, 14kvp Ceramic Disc Capacitor, it looks like it is rated at 60 amps RMS
?
Tracey G5VU
?
----- Original Message -----
From: Tracey Gardner via Groups.Io <tracey.gardner@...>
Sent: 21/03/2020 15:22:49
Subject: [ham-amplifiers] Plate blocking caps YC156
A number of high voltage/current rating ceramic capacitors??have just come up on eBay in the UK.
It looks like they have come out of some kind of RF heating or medical equipment.
I'd be grateful for any thoughts as to their suitability for use as the plate blocking capacitors for a YC156 amp.
The description and eBay item numbers are as follows
Draloric, 2500pf, PE 200, 14kvp Ceramic Disc Capacitor: Item Number 114153436756
Unilator Type 860, 15kv 2000pf, Capacitor: eBay item number:114154806911
Unilator Type 807, 14kv 2000pf Ceramic Disc Capacitor: eBay item number:114154801609
Unilator Type 910, 15kv 1000pf Ceramic Disc Capacitor: eBay item number:114154801080
Many thanks
?
Tracey G5VU
?
----- Original Message ----- From: Jim VE7RF <jim.thom@...> Reply-To: < [email protected]> To: < [email protected]> Sent: 29/12/2019 15:12:42 Subject: Re: [ham-amplifiers] Plate blocking caps YC156 The??problem??with??broadcast?? mica's (or??any??mica)??is??they??won't handle?? any current??on??higher??freqs.??But??they are??NPO.?? Drake used switchable mica's??in their??MN-2000??ant??tuner (along??with??2 x air??variables).?? Drake??used??7 (SEVEN)?? mica's??in??parallel....just??for 10m??band.....just to handle 1200w??pep into??some??swr.?? Drake??used??a single??700 pf??(NPO) mica??to??pad??the 1600??pf??load??cap on??80m band....??on their L4B??80-10??amp. Those CDE and??similar??mica??caps??are??typ rated??at?? 1??mhz??for??max current.??> 6??mhz, they??have??fallen??off really??fast.??>20??mhz,??they??are??down??to??nothing. Mica's??work??superb??on??low??bands (<6 mhz)....??and ceramic??caps work??superb??>2-3 mhz. For??a plate??block??cap, ceramic??is??used,??since??we??require??a cap(s) that??will??handle loads??of??current on??21-29.7??mhz. (+6M).????On lower??bands,??plate??block??cap??current??drops??way??off.....non??issue. HEC??is??still made??in PA...amish??country.?? Download??the??main??catalog for??CERAMIC???? Draloric is??still??made in??germany. Centralab??was??bought??out??by??ITT-Jennings.??Centralab??(ITT-Jennings)????857 /??859??is??the??same??as a HEC?? HT-57??/??HT-59 Everything??else??is??a chinese copy.?? Also??factor??in??the??heat??from??the??anode??will??travel??down??the strap..to??one??side??of??plate block??caps. Jim?? VE7RF
|
Re: Plate blocking caps YC156
Hi Tracey - I used one of these in my 3CX3000 amp
Mine's a 2000pF rated at 20kV.? I have seen them on Ebay for about a tenner - a lot cheaper than the ceramic one you were looking at which I think was ?50.? I'd bought the big ceramic caps in the past off Mr Jandek at Friedrichshafen (a big stand in the fleamarket with Russian vacuum capacitors etc, usually on the back wall - remember him?)? for about 10 euros.? He wasn't there last year (and who knows what will happen this year?)? but he might still be in business.? He was based in Bielefeld last I heard.
I can only state (rather unscientifically) that I haven't blown it up yet.? ?I also use one of the plastic LCC caps as a matching series capacitor on my ground-level fed 3/8 wave wibbly-wonky-sort-of-inverted-L on 160m.? ?The only time I damaged that was when I inadvertently reversed the Land Rover over the feedpoint.? I can't blame RF current for that, only clumsy driving.
Something similar
Alternatively how about getting in touch with Alex UR4LL?? He's a thoroughly reliable chap and will almost certainly have a Russian made equivalent of the ceramic capacitors you mentioned - at a pretty good price from what I remember.
Hope that helps
73
Dave G0OIL
On Saturday, 21 March 2020, 23:04:52 GMT, Tracey Gardner via Groups.Io <tracey.gardner@...> wrote:
?
Having looked at the Draloric data sheet for the 2500pf, R85, PE 200, 14kvp Ceramic Disc Capacitor, it looks like it is rated at 60 amps RMS
?
Tracey G5VU
?
----- Original Message -----
From: Tracey Gardner via Groups.Io <tracey.gardner@...>
Sent: 21/03/2020 15:22:49
Subject: [ham-amplifiers] Plate blocking caps YC156
A number of high voltage/current rating ceramic capacitors??have just come up on eBay in the UK.
It looks like they have come out of some kind of RF heating or medical equipment.
I'd be grateful for any thoughts as to their suitability for use as the plate blocking capacitors for a YC156 amp.
The description and eBay item numbers are as follows
Draloric, 2500pf, PE 200, 14kvp Ceramic Disc Capacitor: Item Number 114153436756
Unilator Type 860, 15kv 2000pf, Capacitor: eBay item number:114154806911
Unilator Type 807, 14kv 2000pf Ceramic Disc Capacitor: eBay item number:114154801609
Unilator Type 910, 15kv 1000pf Ceramic Disc Capacitor: eBay item number:114154801080
Many thanks
?
Tracey G5VU
?
----- Original Message ----- From: Jim VE7RF <jim.thom@...> Reply-To: < [email protected]> To: < [email protected]> Sent: 29/12/2019 15:12:42 Subject: Re: [ham-amplifiers] Plate blocking caps YC156 The??problem??with??broadcast?? mica's (or??any??mica)??is??they??won't handle?? any current??on??higher??freqs.??But??they are??NPO.?? Drake used switchable mica's??in their??MN-2000??ant??tuner (along??with??2 x air??variables).?? Drake??used??7 (SEVEN)?? mica's??in??parallel....just??for 10m??band.....just to handle 1200w??pep into??some??swr.?? Drake??used??a single??700 pf??(NPO) mica??to??pad??the 1600??pf??load??cap on??80m band....??on their L4B??80-10??amp. Those CDE and??similar??mica??caps??are??typ rated??at?? 1??mhz??for??max current.??> 6??mhz, they??have??fallen??off really??fast.??>20??mhz,??they??are??down??to??nothing. Mica's??work??superb??on??low??bands (<6 mhz)....??and ceramic??caps work??superb??>2-3 mhz. For??a plate??block??cap, ceramic??is??used,??since??we??require??a cap(s) that??will??handle loads??of??current on??21-29.7??mhz. (+6M).????On lower??bands,??plate??block??cap??current??drops??way??off.....non??issue. HEC??is??still made??in PA...amish??country.?? Download??the??main??catalog for??CERAMIC???? Draloric is??still??made in??germany. Centralab??was??bought??out??by??ITT-Jennings.??Centralab??(ITT-Jennings)????857 /??859??is??the??same??as a HEC?? HT-57??/??HT-59 Everything??else??is??a chinese copy.?? Also??factor??in??the??heat??from??the??anode??will??travel??down??the strap..to??one??side??of??plate block??caps. Jim?? VE7RF
|
Re: Plate blocking caps YC156
?
Having looked at the Draloric data sheet for the 2500pf, R85, PE 200, 14kvp Ceramic Disc Capacitor, it looks like it is rated at 60 amps RMS
?
Tracey G5VU
?
toggle quoted message
Show quoted text
----- Original Message -----
From: Tracey Gardner via Groups.Io <tracey.gardner@...>
Sent: 21/03/2020 15:22:49
Subject: [ham-amplifiers] Plate blocking caps YC156
A number of high voltage/current rating ceramic capacitors??have just come up on eBay in the UK.
It looks like they have come out of some kind of RF heating or medical equipment.
I'd be grateful for any thoughts as to their suitability for use as the plate blocking capacitors for a YC156 amp.
The description and eBay item numbers are as follows
Draloric, 2500pf, PE 200, 14kvp Ceramic Disc Capacitor: Item Number 114153436756
Unilator Type 860, 15kv 2000pf, Capacitor: eBay item number:114154806911
Unilator Type 807, 14kv 2000pf Ceramic Disc Capacitor: eBay item number:114154801609
Unilator Type 910, 15kv 1000pf Ceramic Disc Capacitor: eBay item number:114154801080
Many thanks
?
Tracey G5VU
?
----- Original Message ----- From: Jim VE7RF <jim.thom@...> Reply-To: < [email protected]> To: < [email protected]> Sent: 29/12/2019 15:12:42 Subject: Re: [ham-amplifiers] Plate blocking caps YC156 The??problem??with??broadcast?? mica's (or??any??mica)??is??they??won't handle?? any current??on??higher??freqs.??But??they are??NPO.?? Drake used switchable mica's??in their??MN-2000??ant??tuner (along??with??2 x air??variables).?? Drake??used??7 (SEVEN)?? mica's??in??parallel....just??for 10m??band.....just to handle 1200w??pep into??some??swr.?? Drake??used??a single??700 pf??(NPO) mica??to??pad??the 1600??pf??load??cap on??80m band....??on their L4B??80-10??amp. Those CDE and??similar??mica??caps??are??typ rated??at?? 1??mhz??for??max current.??> 6??mhz, they??have??fallen??off really??fast.??>20??mhz,??they??are??down??to??nothing. Mica's??work??superb??on??low??bands (<6 mhz)....??and ceramic??caps work??superb??>2-3 mhz. For??a plate??block??cap, ceramic??is??used,??since??we??require??a cap(s) that??will??handle loads??of??current on??21-29.7??mhz. (+6M).????On lower??bands,??plate??block??cap??current??drops??way??off.....non??issue. HEC??is??still made??in PA...amish??country.?? Download??the??main??catalog for??CERAMIC???? Draloric is??still??made in??germany. Centralab??was??bought??out??by??ITT-Jennings.??Centralab??(ITT-Jennings)????857 /??859??is??the??same??as a HEC?? HT-57??/??HT-59 Everything??else??is??a chinese copy.?? Also??factor??in??the??heat??from??the??anode??will??travel??down??the strap..to??one??side??of??plate block??caps. Jim?? VE7RF
|
Re: Plate blocking caps YC156
I think one of those should do the trick, Tracey.?? They're a bit physically big, so I'm not sure what they'd do to stray capacitances for tuning on 10m but quite a few builders use them.?? Cheers Dave G0OIL
On Saturday, 21 March 2020, 15:23:00 GMT, Tracey Gardner via Groups.Io <tracey.gardner@...> wrote:
A number of high voltage/current rating ceramic capacitors??have just come up on eBay in the UK.
It looks like they have come out of some kind of RF heating or medical equipment.
I'd be grateful for any thoughts as to their suitability for use as the plate blocking capacitors for a YC156 amp.
The description and eBay item numbers are as follows
Draloric, 2500pf, PE 200, 14kvp Ceramic Disc Capacitor: Item Number 114153436756
Unilator Type 860, 15kv 2000pf, Capacitor: eBay item number:114154806911
Unilator Type 807, 14kv 2000pf Ceramic Disc Capacitor: eBay item number:114154801609
Unilator Type 910, 15kv 1000pf Ceramic Disc Capacitor: eBay item number:114154801080
Many thanks
?
Tracey G5VU
?
----- Original Message ----- From: Jim VE7RF <jim.thom@...> Reply-To: < [email protected]> To: < [email protected]> Sent: 29/12/2019 15:12:42 Subject: Re: [ham-amplifiers] Plate blocking caps YC156 The??problem??with??broadcast?? mica's (or??any??mica)??is??they??won't handle?? any current??on??higher??freqs.??But??they are??NPO.?? Drake used switchable mica's??in their??MN-2000??ant??tuner (along??with??2 x air??variables).?? Drake??used??7 (SEVEN)?? mica's??in??parallel....just??for 10m??band.....just to handle 1200w??pep into??some??swr.?? Drake??used??a single??700 pf??(NPO) mica??to??pad??the 1600??pf??load??cap on??80m band....??on their L4B??80-10??amp. Those CDE and??similar??mica??caps??are??typ rated??at?? 1??mhz??for??max current.??> 6??mhz, they??have??fallen??off really??fast.??>20??mhz,??they??are??down??to??nothing. Mica's??work??superb??on??low??bands (<6 mhz)....??and ceramic??caps work??superb??>2-3 mhz. For??a plate??block??cap, ceramic??is??used,??since??we??require??a cap(s) that??will??handle loads??of??current on??21-29.7??mhz. (+6M).????On lower??bands,??plate??block??cap??current??drops??way??off.....non??issue. HEC??is??still made??in PA...amish??country.?? Download??the??main??catalog for??CERAMIC???? Draloric is??still??made in??germany. Centralab??was??bought??out??by??ITT-Jennings.??Centralab??(ITT-Jennings)????857 /??859??is??the??same??as a HEC?? HT-57??/??HT-59 Everything??else??is??a chinese copy.?? Also??factor??in??the??heat??from??the??anode??will??travel??down??the strap..to??one??side??of??plate block??caps. Jim?? VE7RF
|
Plate blocking caps YC156
A number of high voltage/current rating ceramic capacitors??have just come up on eBay in the UK.
It looks like they have come out of some kind of RF heating or medical equipment.
I'd be grateful for any thoughts as to their suitability for use as the plate blocking capacitors for a YC156 amp.
The description and eBay item numbers are as follows
Draloric, 2500pf, PE 200, 14kvp Ceramic Disc Capacitor: Item Number 114153436756
Unilator Type 860, 15kv 2000pf, Capacitor: eBay item number:114154806911
Unilator Type 807, 14kv 2000pf Ceramic Disc Capacitor: eBay item number:114154801609
Unilator Type 910, 15kv 1000pf Ceramic Disc Capacitor: eBay item number:114154801080
Many thanks
?
Tracey G5VU
?
toggle quoted message
Show quoted text
----- Original Message ----- From: Jim VE7RF <jim.thom@...> Reply-To: < [email protected]> To: < [email protected]> Sent: 29/12/2019 15:12:42 Subject: Re: [ham-amplifiers] Plate blocking caps YC156 The??problem??with??broadcast?? mica's (or??any??mica)??is??they??won't handle?? any current??on??higher??freqs.??But??they are??NPO.?? Drake used switchable mica's??in their??MN-2000??ant??tuner (along??with??2 x air??variables).?? Drake??used??7 (SEVEN)?? mica's??in??parallel....just??for 10m??band.....just to handle 1200w??pep into??some??swr.?? Drake??used??a single??700 pf??(NPO) mica??to??pad??the 1600??pf??load??cap on??80m band....??on their L4B??80-10??amp. Those CDE and??similar??mica??caps??are??typ rated??at?? 1??mhz??for??max current.??> 6??mhz, they??have??fallen??off really??fast.??>20??mhz,??they??are??down??to??nothing. Mica's??work??superb??on??low??bands (<6 mhz)....??and ceramic??caps work??superb??>2-3 mhz. For??a plate??block??cap, ceramic??is??used,??since??we??require??a cap(s) that??will??handle loads??of??current on??21-29.7??mhz. (+6M).????On lower??bands,??plate??block??cap??current??drops??way??off.....non??issue. HEC??is??still made??in PA...amish??country.?? Download??the??main??catalog for??CERAMIC???? Draloric is??still??made in??germany. Centralab??was??bought??out??by??ITT-Jennings.??Centralab??(ITT-Jennings)????857 /??859??is??the??same??as a HEC?? HT-57??/??HT-59 Everything??else??is??a chinese copy.?? Also??factor??in??the??heat??from??the??anode??will??travel??down??the strap..to??one??side??of??plate block??caps. Jim?? VE7RF
|
I think somewhere in my “paper” archives I have either a GE or RCA bulletins. I thought that one of them showed how to make a home-brew test jig that would adequately test emissions of transmitting tubes. Now I am going from memory but it had all the common tubes of the era and they even showed an 813 as part of the test. The bulletins are available on line to read. I suggest you try there. ? Mod-U-Lator, Mike(y)/W3SLK ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Carl
Sent: Sunday, March 15, 2020 8:03 PM
To: [email protected]
Subject: Re: [ham-amplifiers] AL-811Question? A tube tester uses low voltage?to "test" emission which is far from what the tube does at HV and with RF. Even my fairly high end Hickok 752A is only good to give a quick and basic answer ....if a 811/572B is dead or not, has a short or is gassy. Many of the low end testers do not even have the ability to handle a 4A 6.3V filament. ----- Original Message ----- Sent: Tuesday, March 10, 2020 12:37 PM Subject: Re: [ham-amplifiers] AL-811Question You can if they are good.? Have you checked them on a good tester.? My preference is to buy all three with matching attributes.? But, that is not necessary.? You ca replace the one that is bad.? But, be absolutely sure the other two are good. ? On Tue, Mar 10, 2020 at 11:25 AM BJ-K7BRR via Groups.Io <wcbilljohnson=[email protected]> wrote: I am repairing an AL-811 that was blowing fuses.
I found one of the 811 tubes had a short between the filament and plate.
My question is can I buy an 811A tube and run it with the two existing 811 tubes?
Bill J K7BRR
--
|
?
A tube tester uses low voltage?to "test"
emission which is far from what the tube does at HV and with RF.
?
Even my fairly high end Hickok 752A is only good to
give a quick and basic answer ....if a 811/572B is dead or not, has a short or
is gassy.
?
Many of the low end testers do not even have the
ability to handle a 4A 6.3V filament.
?
Carl
----- Original Message -----
Sent: Tuesday, March 10, 2020 12:37
PM
Subject: Re: [ham-amplifiers]
AL-811Question
You can if they are good.? Have you checked them on a good
tester.? My preference is to buy all three with matching
attributes.? But, that is not necessary.? You ca replace the one
that is bad.? But, be absolutely sure the other two are good.
Lou WA5LOU
On Tue, Mar 10, 2020 at 11:25 AM BJ-K7BRR via
Groups.Io <wcbilljohnson= [email protected]>
wrote: I am repairing an AL-811 that was blowing fuses.
I
found one of the 811 tubes had a short between the filament and
plate.
My question is can I buy an 811A tube and run it with the two
existing 811 tubes?
Bill J K7BRR
--
|
Yes you can.but dont mix brands. Stick to Chinese, USA, Russia, etc
Also do not run at more than 450W out for longevity on the 3 tube amp (600W with the 811H) with import tubes as they are not true 811A's as built by RCA, etc.
Carl
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----- Original Message ----- From: BJ-K7BRR via Groups.Io To: [email protected]Sent: Monday, March 09, 2020 5:49 PM Subject: [ham-amplifiers] AL-811Question I am repairing an AL-811 that was blowing fuses. I found one of the 811 tubes had a short between the filament and plate. My question is can I buy an 811A tube and run it with the two existing 811 tubes? Bill J K7BRR --- This email has been checked for viruses by AVG.
|
Smart move Bill!? Let us know how you make out!
Lou WA5LOU
On Thu, Mar 12, 2020 at 5:18 PM BJ-K7BRR via Groups.Io <wcbilljohnson= [email protected]> wrote:
Thanks Lou I went ahead and ordered 3 new 811A's.
Bill J K7BRR
On Thursday, March 12, 2020, 02:32:55 PM MST, Lou Everett, Sr. < loueverettsr@...> wrote:
You can if they are good.? Have you checked them on a good tester.? My preference is to buy all three with matching attributes.? But, that is not necessary.? You ca replace the one that is bad.? But, be absolutely sure the other two are good.
Lou WA5LOU On Tue, Mar 10, 2020 at 11:25 AM BJ-K7BRR via Groups.Io <wcbilljohnson= [email protected]> wrote: I am repairing an AL-811 that was blowing fuses.
I found one of the 811 tubes had a short between the filament and plate.
My question is can I buy an 811A tube and run it with the two existing 811 tubes?
Bill J K7BRR
--
|
Thanks Lou I went ahead and ordered 3 new 811A's.
Bill J K7BRR
On Thursday, March 12, 2020, 02:32:55 PM MST, Lou Everett, Sr. <loueverettsr@...> wrote:
You can if they are good.? Have you checked them on a good tester.? My preference is to buy all three with matching attributes.? But, that is not necessary.? You ca replace the one that is bad.? But, be absolutely sure the other two are good.
Lou WA5LOU
On Tue, Mar 10, 2020 at 11:25 AM BJ-K7BRR via Groups.Io <wcbilljohnson= [email protected]> wrote: I am repairing an AL-811 that was blowing fuses.
I found one of the 811 tubes had a short between the filament and plate.
My question is can I buy an 811A tube and run it with the two existing 811 tubes?
Bill J K7BRR
|
You can if they are good.? Have you checked them on a good tester.? My preference is to buy all three with matching attributes.? But, that is not necessary.? You ca replace the one that is bad.? But, be absolutely sure the other two are good.
Lou WA5LOU
On Tue, Mar 10, 2020 at 11:25 AM BJ-K7BRR via Groups.Io <wcbilljohnson= [email protected]> wrote: I am repairing an AL-811 that was blowing fuses.
I found one of the 811 tubes had a short between the filament and plate.
My question is can I buy an 811A tube and run it with the two existing 811 tubes?
Bill J K7BRR
|
I am repairing an AL-811 that was blowing fuses.
I found one of the 811 tubes had a short between the filament and plate.
My question is can I buy an 811A tube and run it with the two existing 811 tubes?
Bill J K7BRR
|
?
With some older analog VOM's having a 6 KV socket
Id say the probe wire is good to at least 10 KV,
?
Ive seen regular RG8/213 used to over 6KV in
commercial installations to run HV around.but I wouldnt do it with worn out
hamfest wire, Ive used it to 3600V for 30 years in my 2M amp but replace it
every 10 years or so. UHF cnnectors are Teflon Amphenol.
?
Teflon cable can be dangerous as the center
conductor cold flows in bends.
?
Carl
?
?
?
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----- Original Message -----
Sent: Monday, March 09, 2020 3:57
PM
Subject: Re: [ham-amplifiers] High
voltage wire
Usually
test lead wire is good for about 6KV. You can get ‘igniter wire’ from a
furnace place. We use it for igniting our pilots on our waste solvent
burners.? That stuff is usually
silicone and good for about 20KV.
?
Mod-U-Lator,
Mike(y)/W3SLK
?
?
?
From:
[email protected]
[mailto:[email protected]] On Behalf
Of Richard P via Groups.Io
Sent: Monday, March 9, 2020 10:04
AM
To:
[email protected]
Subject: [ham-amplifiers] High voltage
wire
?
What do folks use nowadays for high voltage wire
between a power supply and the amp? A check with car parts stores for spark
plug wire yields only today’s weird stuff (used to suppress radio
interference?) that doesn’t have copper. In one case, ?a “high
performance” spark wire company boasts that their product has a resistance of
“only” 40-50 ohms per foot. Ridiculous. Thoughts?
Richard
WB5NEN
|
I have used Packard 440 ignition wire from NAPA or Advance Auto.
Currently, I am running 10KV at 3.7 amps on a commercial Radio FM station
using Neon Light wiring from a local Neon sign shop.
Don W4DNR
|
Ebay. Type in high voltage wire 15kv and you should get enough
hits.
73, Alek. VK6APK
On 9/03/2020 10:04 pm, Richard P via
Groups.Io wrote:
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What do folks use nowadays for high voltage wire between a power
supply and the amp? A check with car parts stores for spark plug
wire yields only today’s weird stuff (used to suppress radio
interference?) that doesn’t have copper. In one case, ?a “high
performance” spark wire company boasts that their product has a
resistance of “only” 40-50 ohms per foot. Ridiculous. Thoughts?
Richard
WB5NEN
|
Packard 440 ignition wire NAPA or AZ.
Neon sign wire.? Local sign shop I use it on a commercial FM? 10kv@ 3.7amps?
Don W4DNR?
|
Usually test lead wire is good for about 6KV. You can get ‘igniter wire’ from a furnace place. We use it for igniting our pilots on our waste solvent burners.? That stuff is usually silicone and good for about 20KV. ? Mod-U-Lator, Mike(y)/W3SLK ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Richard P via Groups.Io
Sent: Monday, March 9, 2020 10:04 AM
To: [email protected]
Subject: [ham-amplifiers] High voltage wire ? What do folks use nowadays for high voltage wire between a power supply and the amp? A check with car parts stores for spark plug wire yields only today’s weird stuff (used to suppress radio interference?) that doesn’t have copper. In one case, ?a “high performance” spark wire company boasts that their product has a resistance of “only” 40-50 ohms per foot. Ridiculous. Thoughts?
Richard
WB5NEN
|
What about some wire that was used for the picture tube HV
connection, if its around anymore?
Andy? K9ATX
On 3/9/2020 11:14 AM, Scott, KB3JQQ via
Groups.Io wrote:
On Monday, March 9, 2020, 12:07:36 PM EDT, Richard P via
Groups.Io <wb5nen@...> wrote:
What do folks use
nowadays for high voltage wire between a power supply and
the amp? A check with car parts stores for spark plug wire
yields only today’s weird stuff (used to suppress radio
interference?) that doesn’t have copper. In one case, ?a
“high performance” spark wire company boasts that their
product has a resistance of “only” 40-50 ohms per foot.
Ridiculous. Thoughts?
Richard
WB5NEN
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"Where the Old Soo crossed the New Soo"
Duplainville, Wisconsin
Web page at:
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I use 30KV neon sign wire from amazon.? The white version.? I
then strip some coax braid from some RG58 to make a shield.
C
On 3/9/2020 7:04 AM, Richard P via
Groups.Io wrote:
What do folks use nowadays for high voltage wire between a power
supply and the amp? A check with car parts stores for spark plug
wire yields only today’s weird stuff (used to suppress radio
interference?) that doesn’t have copper. In one case, ?a “high
performance” spark wire company boasts that their product has a
resistance of “only” 40-50 ohms per foot. Ridiculous. Thoughts?
Richard
WB5NEN
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Please let me quote you for your parts needs!
I offer a discount on Protunes with parts order!
Clark Turner
480-695-2898
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I’ve used Teflon RG-8.? Left the shield on and grounded it at each end.? I bought it from a junk pile at a hamfest. ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of DAVE WHITE via Groups.Io
Sent: Monday, March 9, 2020 12:43
To: [email protected]
Subject: Re: [ham-amplifiers] High voltage wire? PTFE coax?? I bought some HT cable from a hamfest years and years ago but don’t recall seeing anything similar recently? ? Dave G0OIL?
On Monday, March 9, 2020, 4:14 pm, Scott, KB3JQQ via Groups.Io <kb3jqq@...> wrote: On Monday, March 9, 2020, 12:07:36 PM EDT, Richard P via Groups.Io <wb5nen@...> wrote: What do folks use nowadays for high voltage wire between a power supply and the amp? A check with car parts stores for spark plug wire yields only today’s weird stuff (used to suppress radio interference?) that doesn’t have copper. In one case, ?a “high performance” spark wire company boasts that their product has a resistance of “only” 40-50 ohms per foot. Ridiculous. Thoughts?
Richard
WB5NEN
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Adam Moss