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 ?
HD? opto? isolator? will? be? used? to? activate? the? 12? vdc? vac? relay? coil.? Opto's output? side? is? just? a solid? state SPST? device.? I? can? activate several? vac? relays, if? required, with just? one? opto.
Jim? ?VE7RF??
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Re: How to make a relay slow release ?
I? could? also? wire a small? 250 vac? rated MOV? across relay? contacts.
Jim? VE7RF
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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 ?
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@...>:
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<Don Roden
Feb 26 #37161 ( /g/ham-amplifiers/message/37161 )
<Slow delay also equals slow pickup unless you add another relay contact.
<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 ?
<Slow delay also equals slow pickup unless you add another relay contact.?
?
<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 ?
< 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 ?
Slow delay also equals slow pickup unless you add another relay contact.?
Don W4DNR?
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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 ?
I'm? going? to? use a? resistor to? slow? down a blower....on? RX.? ? ?Resistor? shunted? on? TX.....? with a DPST - NO Kilovac vac? relay.? (contacts in? parallel). (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? ?
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Re: How to make a relay slow release ?
Wouldn't just the inertia of
the blower itself provide almost the same delays you are
desiring?
Joe WB9SBD
The Original Rolling
Ball Clock
Idle Tyme
Idle-Tyme.com
On 2/26/2020 11:56 AM, Jim VE7RF wrote:
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I'm? going? to? use a? resistor to? slow? down a blower....on?
RX.? ? ?Resistor? shunted? on? TX.....? with a DPST - NO Kilovac
vac? relay.? (contacts in? parallel).
(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? ?
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How to make a relay slow release ?
I'm? going? to? use a? resistor to? slow? down a blower....on? RX.? ? ?Resistor? shunted? on? TX.....? with a DPST - NO Kilovac vac? relay.? (contacts in? parallel).
(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? ?
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Question about Ameritron AL-1200 Amp (Uses one 3CX1200Z7 tube) - "UPDATE!"
Thought I'd let all you guys, 25 replies I received with advice, what a great group of folks you all are! Anyway, I hooked up KN4UNA's AL-1200 amp he received from his uncle's estate, W4WWF Rober "Dale" Mash, that there was nothing wrong with the amp! W4WWF Dale passed away back on May 23, 2017 at age 56 from lung cancer and the amp had been sitting in Dale's house until recently and had not been hooked up in all that time and KN4UNA, P.J., said it arced when he turned it on, but ran fine afterward and he had left it here??with me just?recently to take a look at. Well, I hooked it up last week and ran it for 3 days in succession and I never got a arc, not one in all that time, and I could hear what sounded like the step start circuit slowly bring it up and the cooling fan speed increased a step at a time as it did. I tuned it up and am getting legal limit with 85 watts of drive so there's nothing wrong with it! I guess the arc happened just because it had set for so long and too it could have been some dust although it had one of those embroidered dust covers on it the entire time. The amp looks like brand new! Anyway, wanted to get back to you guys and thank you again for all the suggestions and replies to my original post.?
Very 73!
Cliff, KU4GW
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Re: Kilovac relay in MFJ 2020 catalog.
Good? point.? All? my? 1/2? dozen? opto? ssr's? are? 200 Vdc? @? 1A......(ODC-3A).? ? ?The? ODC-3 is? rated? at? 60? dvc? @? 3A? ccs.? (both? have? 4 kv? AC? isolation).? ?Moot? point,? since? bigger? opto's? are? available.? ? Opto's? can? also? be? paralleled? for? more? current.? ?Paralleled? 3A? opto's? would /should? be? bomb? proof.?
Jim? VE7RF??
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Re: Kilovac relay in MFJ 2020 catalog.
I use the red Opto 22 SSR in my YC156 and a friend is using it in
a GS35B amp to switch around the cut off resistor.
I got a truck load of them for nothing, years ago, so I thought I
might as well use them.
Even faster than a vacuum relay.
Cheers, Alek VK6APK
On 19/02/2020 11:07 pm, Jim VE7RF
wrote:
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Page 76? ?in? the? 2020? MFJ? catalog.
A. 408-8100, $19.95.? ? Kilovac S05FJA238, DPST-NO, contact form
2A.? 5kV rating between contacts, current is 10A DC or 5A RF, 12
VDC coil voltage and 500 Ohm coil resistance.?
##? Has? anybody? used? this? relay b4,? for? any? application ??
?I? was? going? to? use one (with? contacts? in? parallel,? to
shunt? the? 100K resistor in? the? CT,? when? on? TX.? (Bias? cut?
off? resistor? on a? GG? triode).? ?$19.95? is? cheap? for a new?
vac? relay.? ?It? only? has? to? handle cathode? current.? (sum?
of grid +? plate? current).? I? want? it? FAST.
##? I? have a small? ceramic? jennings spst-no,? 3.6kv @ 10A? I?
was? going? to? use? for the? same? application,? but alas,? I?
can't? find? it? in my? ?myriad? of? shelves +? boxes.?
Jim? VE7RF?
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Kilovac relay in MFJ 2020 catalog.
Page 76? ?in? the? 2020? MFJ? catalog.
A. 408-8100, $19.95.? ? Kilovac S05FJA238, DPST-NO, contact form 2A.? 5kV rating between contacts, current is 10A DC or 5A RF, 12 VDC coil voltage and 500 Ohm coil resistance.?
##? Has? anybody? used? this? relay b4,? for? any? application ?? ?I? was? going? to? use one (with? contacts? in? parallel,? to shunt? the? 100K resistor in? the? CT,? when? on? TX.? (Bias? cut? off? resistor? on a? GG? triode).? ?$19.95? is? cheap? for a new? vac? relay.? ?It? only? has? to? handle cathode? current.? (sum? of grid +? plate? current).? I? want? it? FAST.
##? I? have a small? ceramic? jennings spst-no,? 3.6kv @ 10A? I? was? going? to? use? for the? same? application,? but alas,? I? can't? find? it? in my? ?myriad? of? shelves +? boxes.?
Jim? VE7RF?
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I? bought? the? Vishay? resistors? at? Mouser.?
Jim? VE7RF
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<BUT only 85C rated, that could be rough when using a high ripple doubler HV PS.
##? 120? hz? ripple? current? into? the? filter? cap(S) is? the? same, regardless of? whether a FWD, FWB, FWCT? is? used...and? total? C? is? the? same for? each? config.? ? 120? hz ripple? current? is? aprx 2.5? X? the? loaded? DC? plate? current draw.? ?It's? sometimes? as? high? as? almost? triple? the? DC? plate? current.? ?All? these rinky? dink 200 uf - 330 uf? lytics are? typ? rated? at? 1500ma? to? 1750ma? for? ripple? current.? (85-95-105 C).
##? That? 85-95-105 deg? C? rating? is? the temp? of? the? air? surrounding? the? outside? of the lytics? casing.? ?Ripple? current? rating? skyrockets when surrounding??air? temp? is? lower? than? 85-95-105 C...which? is? normally? the? case. When? was? the? last? time you? measured high? temps? surrounding? the? casings? of? lytics ?? ?
##? Don't? operate? lytics? at more? than? 75%? of? their? stamped? V? rating...and? they? will? last? a? loooong? time.? ?Typ,? larger uf? rated? caps? will? also? have? progressively higher? ripple? current? ratings.? ?Both? ?my? ? 2200uf (85? deg? C,? 450? vdc).... + 2500uf (95? deg C,? 450? vdc)? lytics? are? rated? at? 9.8A? ripple? current.... My? ?10,000uf lytics? are rated? at? 22 amps? ripple? current..(85? deg? C,? 450? vdc).? ? One? can? also? parallel lytics? for both more uf? and? also? more? ripple? current.? And? of? course? lytics? can? be in series for? more? B+.?
##? Instead? of? a 4x2? or? 2x4? matrix, a 3x3 is? sometimes? used,? to? increase? max? V.....? provided they? will? fit.? Sometimes a 2x5? setup? is? used.?
##? I? use? Vishay? brand? 100K @? 3 watt? MOF, 1%? Tolerance? eq? resistors, one? across? each? cap.? Come? in? ?100? per? box.? ?I? tested? 300? of them,? and all? 300 measured? exactly? 99,980? ohms. IE:? there? is? zero? tolerance? between? any? of? em.? V? drop? across each? lytic? is? identical !? ?Cust? pn #? ?1-CPF3-F-100K-T2? ? Vishay? pn? CPF3100K00FHB14
Jim? VE7RF
?
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?
Thanks for that info, I'll order some and run them
as a 500V cap with some safety margin.
?
Carl
?
?
?
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----- Original Message -----
Sent: Friday, February 14, 2020 9:48
PM
Subject: Re: [ham-amplifiers]
Electrolytic Caps.
Derated for 105C = 600 X .91 =
546V
?
Voltage derating
(0.91VR) enables 105°C operation
?
?
?
?
BUT only 85C rated,
that could be rough when using a high ripple doubler HV
PS.
----- Original
Message -----
Sent: Friday, February
14, 2020 5:56 PM
Subject: [ham-amplifiers]
Electrolytic Caps.
For those who might be building or considering a HV power
supply, Newark currently has a promotional price on 600V 270uF caps that
appears to be a bargain.
I
have no pecuniary interest.
Regards,
Roy
K9ER
|
Derated for 105C = 600 X .91 = 546V ? Voltage derating (0.91VR) enables 105°C operation ? 
? ? ? BUT only 85C rated, that could be rough when using a high ripple doubler HV PS.
toggle quoted message
Show quoted text
----- Original Message ----- Sent: Friday, February 14, 2020 5:56 PM Subject: [ham-amplifiers] Electrolytic Caps. For those who might be building or considering a HV power supply, Newark currently has a promotional price on 600V 270uF caps that appears to be a bargain.
I have no pecuniary interest.
Regards,
Roy
K9ER
|
?
BUT only 85C rated, that could be rough when using
a high ripple doubler HV PS.
----- Original Message -----
Sent: Friday, February 14, 2020 5:56
PM
Subject: [ham-amplifiers] Electrolytic
Caps.
For those who might be building or considering a HV power
supply, Newark currently has a promotional price on 600V 270uF caps that
appears to be a bargain.
I
have no pecuniary interest.
Regards,
Roy
K9ER
|
Re: Tokyo Hy Power HL-45B question.
Assuming that the amp is functional, are you sure you that you don’t have it in standby or that it is being keyed properly by the radio.? You don’t need ALC when then amp is driven with almost any solid-state transceiver. ? 73, ? Steve ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Terry ONeill
Sent: Wednesday, February 05, 2020 10:49 AM
To: [email protected]
Subject: [ham-amplifiers] Tokyo Hy Power HL-45B question. ? I recently acquired a Tokyo Hypower HL-45B in excellent cosmetic condition. I do not have a Yaesu FT817 and attempted to drive the amp with another qrp rig @ 5 watts with no alc cable between the amp & the rig. Bottom line I'm only getting 5 watts into my dummy load.? It's as if the amp is not putting out any power. My question: Is an ALC connection required to key this amp?
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