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Re: High voltage wire
开云体育?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 -----
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Re: High voltage wire
开云体育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:
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? |
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Re: High voltage wire
开云体育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? |
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Re: High voltage wire
开云体育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 ? 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? _._,_._,_ |
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Re: High voltage wire
开云体育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:
-- "Where the Old Soo crossed the New Soo" Duplainville, Wisconsin Web page at: |
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Re: High voltage wire
开云体育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? -- 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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Re: High voltage wire
开云体育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. ? Jim -?KR9U ? 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:
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Re: High voltage wire
开云体育Check into wire for test lead use.? You can find fantastically
high voltage ratings on those. 73/jeff/ac0c alpha-charlie-zero-charlie On 3/9/20 11:43 AM, DAVE WHITE via
Groups.Io wrote:
PTFE coax?? |
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Re: High voltage wire
PTFE coax??
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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:
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Re: High voltage wire
Neon sign wire?
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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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 |
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Re: How to make a relay slow release ?
25k? uf? ?cap? is? only? charged up? to? 12? vdc...? = lousy 1.8? joules.? ? Cap? in parallel? with? 12 vdc? coil.?
Relay? contacts? wired? across? the? drop? resistor? to? blower.? Drop? Resistor inserted? in? series? with? one? leg? of? the? 230 vac? small blower.? A? 555? is? another? option.? Jim? VE7RF |
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Re: How to make a relay slow release ?
How much relay pitting would you get at 25,000 uf ?
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A little more complicated, but a 555 timer with a adjustment knob might let you experiment a little more with hang time. Don W4DNR Quoting Jim VE7RF <jim.thom@...>: <Don Roden |
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Re: How to make a relay slow release ?
<Don Roden
Feb 26???#37161??
<Slow delay also equals slow pickup unless you add another relay contact.?
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<Don W4DNR?
##? I? had? thought? of? that scenario.? A? 25,000 uf cap,? charged? up to? 12 vdc? =? 1.8? joules? (1.8? watts? for? 1? second).? 12 VDC vacuum? relay,? with a 500? ohm? coil? =? .288? watts.? ?1.8 / .288 =? ?6.25? seconds slower? release time. ##? I? will? measure? both? the? 'pickup'..and also...'dropout' vdc? of? the vac? relay.? ?I? suspect? both? will? be? far? less? than? 12? vdc. ##? On? paper,? the? 25,000 uf? cap? should? charge up very? fast,? almost? instantaneously.?? ##? Relay? in? question? is? the? kilovac? DPST-NO,? sold? by Ameritron /? MFJ.? ? PN 408-8100, $19.95? ?(page? 76? in? 2020? online? catalog).? 5? kv? @? 10A? contacts. (5A? RF). So? will? parallel? the? contacts..and? turn? it? into a hd? SPST? 20A? CCS? rated fast? vac? relay. Those? relays? are? cheap? from? ameritron.?I'm? gonna? use? one to? shunt? out? the? 50? k? resistor in? the? CT? of? fil? xfr.... on? TX.? Jim? VE7RF |
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Re: How to make a relay slow release ?
< Joe WB9SBD
Feb 26???#37160??
< Wouldn't just the inertia of the blower itself provide almost the same delays you are desiring?
##? I? thought? about? that..after I posted !? ?Point? well? taken.? ?I? will? test on bench...and? time? how? long? it? takes? to? spool? down....and? also? spool? back? up? to? max? rpm.? I? suspect? the? spool? up? time? will? be? a lot? faster..vs? spool? down? time.? Jim? VE7RF |
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Re: How to make a relay slow release ?
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-------- Original message -------- From: Jim VE7RF <jim.thom@...> Date: 2/26/20 11:56 AM (GMT-06:00) Subject: [ham-amplifiers] How to make a relay slow release ? (12? vdc? coil,? 500? ohm? coil? resistance).?? I? want? to? make? the? relay slow? release,? like? .75? to? ?1 sec? release.? ?I? was? thinking of? a RVS? connected? diode? across? the? coil, + an? electrolytic? across? the? coil.? Electrolytic? wired? with? same? polarity? applied? to? coil.? ?10,000uf? to? 25,000uf? ?(on? paper)? should? work.? The? idea? is? to? keep? the? blower at? max? speed? during? TX,? even? when? VOX? drops? out.? ?Typ I? use .375 sec? vox? delay. Jim? VE7RF? ? |
Scott, KB3JQQ