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1. [Amps] T'bolt ideas (score: 1)
Author: vic@rakefet.com (Vic Rosenthal)
Date: Tue, 14 Jan 2003 07:54:54 -0800
Only if you drink the homebrew. Vic K2VCO
/archives//html/Amps/2003-01/msg00112.html (7,344 bytes)

2. Re: [Amps] rf drive (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Sat, 04 Oct 2003 13:41:05 -0700
carl seyersdahl wrote: Here's a question I never gave any thought to in the past. does the rf drive required for one amplifier tube double when using two tubes?? It depends. If it's an amplifier that
/archives//html/Amps/2003-10/msg00038.html (7,396 bytes)

3. Re: [Amps] Capacitor Recommendation Needed (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Mon, 06 Oct 2003 09:33:33 -0700
George & Marijke Guerin wrote: We tried to make an 80 meter trap using a big high voltage 150 or 200 pfd door knob and blew it up on the first test with power!! Three 75 pfd door knobs in parallel or
/archives//html/Amps/2003-10/msg00054.html (8,372 bytes)

4. Re: [Amps] Henry 750? (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Wed, 15 Oct 2003 06:36:16 -0700
Gene Bigham wrote: Anyone on this list with real life experience with the Henry 750 not the larger 1200 unit? I had one. They seem to be making modifications all the time, so current units may not be
/archives//html/Amps/2003-10/msg00138.html (7,793 bytes)

5. Re: [Amps] Tuned Input and the MFJ-259B (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Thu, 23 Oct 2003 20:32:52 -0700
Bill Smith wrote: I am using a MFJ-259B to tune up my Tuned Input circuits. I know to go for 1:1 SWR or as close as I can get it and 50 ohms of resistance(Rs). How about Xs? What value am I shooting
/archives//html/Amps/2003-10/msg00222.html (8,130 bytes)

6. Re: [Amps] Tuned Input and the MFJ-259B (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Fri, 24 Oct 2003 08:42:28 -0700
Aargh! I SHOULD have said: You probably know this, but the correct way to do it is to temporarily put a non-inductive resistor equal to the input impedance of your tubes under operating conditions FR
/archives//html/Amps/2003-10/msg00233.html (7,239 bytes)

7. Re: [Amps] Tuning a 30L-1 (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Fri, 31 Oct 2003 07:59:44 -0800
Dan Levin wrote: If I tune the amp for maximum power output, I tune it with less Load than the previous method (the manual's method) would suggest, and I get about 700 watts of output at 600 ma of pl
/archives//html/Amps/2003-11/msg00004.html (7,378 bytes)

8. Re: [Amps] SB220 (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Tue, 04 Nov 2003 08:21:10 -0800
ZL2AAA wrote: Hi All A local amateur has the opportunity to purchase a SB220 with new 3/500's what are the pro's and con's for this amp and what is a reasonable price .Tnx Morrie Can't tell you a rea
/archives//html/Amps/2003-11/msg00048.html (7,889 bytes)

9. Re: [Amps] SB220 vote (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Thu, 06 Nov 2003 08:33:30 -0800
John T. M. Lyles wrote: To add one more opinion, I also feel that the Heath SB220 is a classic, simple yet elegant design, which is timeless. <snip> My hat is off to the hams at former Heath company
/archives//html/Amps/2003-11/msg00080.html (7,326 bytes)

10. Re: [Amps] SB220 vote (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Fri, 07 Nov 2003 08:05:04 -0800
R. Measures wrote: ** Vic -- If W8JI designed the SB-1000, then who designed the original Amp Supply AL-80? Rich, I know he is responsible for the Ameritron AL-80, which I believe came out after the
/archives//html/Amps/2003-11/msg00099.html (7,812 bytes)

11. Re: [Amps] SB220 vote (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Fri, 07 Nov 2003 12:33:10 -0800
Steven Grant W4IIV wrote: does it matter Rich? to me the single 3-500Z amps today are junk. (junque for the higher classes) my data tells me that at 3,000 volts, the max plate current should be 370-4
/archives//html/Amps/2003-11/msg00100.html (8,037 bytes)

12. Re: [Amps] SB220/221 - won't load on 80 (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Mon, 10 Nov 2003 07:43:09 -0800
Dana Roode wrote: The problem turned out to be a missing wire to carry the RF from the load capacitor to the antenna relay. It goes from above the chasis through a hole to a lead on the relay that al
/archives//html/Amps/2003-11/msg00139.html (7,542 bytes)

13. Re: [Amps] Alpha 86 (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Sun, 23 Nov 2003 23:01:36 -0800
lou de beer wrote: Anyone own an Alpha 86...I have a question regarding the bandswitch..... I just replaced a bandswitch wafer on one. What do you want to know? Vic K2VCO ____________________________
/archives//html/Amps/2003-11/msg00348.html (6,681 bytes)

14. Re: [Amps] Alpha 86 (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Mon, 24 Nov 2003 19:59:19 -0800
R. Measures wrote: lou de beer wrote: Anyone own an Alpha 86...I have a question regarding the bandswitch..... I just replaced a bandswitch wafer on one. ... ** Vic -- I would like to buy the old ban
/archives//html/Amps/2003-11/msg00357.html (8,693 bytes)

15. Re: [Amps] Alpha 86 (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Tue, 25 Nov 2003 07:52:14 -0800
R. Measures wrote: ** But how did the 160m Load-C padder contacts arc if they were closed? The current through them was high enough to melt them. When you get the switch you will see that one contact
/archives//html/Amps/2003-11/msg00367.html (8,039 bytes)

16. Re: [Amps] tubes in parallel (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Wed, 03 Dec 2003 07:56:34 -0800
kenw2dtc wrote: I want to build a grounded grid amp with two triodes in parallel. Would there be a problem if there were two separate sets of plate chokes and suppressors and glitch resistors and com
/archives//html/Amps/2003-12/msg00035.html (7,336 bytes)

17. Re: [Amps] disk caps needed (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Thu, 25 Dec 2003 07:57:37 -0800
Don Knight wrote: Maybe I don't know what I'm looking for but the capacitor is marked "EKC .02 GMV 1.6KV" This capacitor goes in an old Heathkit DX-100 transmitter. It's 0.02 microfarads, of course.
/archives//html/Amps/2003-12/msg00382.html (7,565 bytes)

18. Re: [Amps] Dentron Clipperton L on 17 meters (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Fri, 26 Dec 2003 08:31:57 -0800
monty taylor wrote: Has anyone used a Dentron Clipperton L on 17 meters successfully? I have two of the later amps Dentron manufactured, they have the tuned input on the same pc board that the tube s
/archives//html/Amps/2003-12/msg00393.html (8,130 bytes)

19. Re: [Amps] Vacuum relays in Dentron MLA-2500 (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Fri, 26 Dec 2003 14:28:07 -0800
Pete Smith wrote: I can testify that, even when isolated with a strip of silicon rubber around its circumference, the HC-1 vacuum relay in my modified SB-220 is noisier than the original open-frame r
/archives//html/Amps/2003-12/msg00402.html (8,731 bytes)

20. Re: [Amps] Vacuum relays in Dentron MLA-2500 (score: 1)
Author: Vic Rosenthal <vic@rakefet.com>
Date: Sat, 27 Dec 2003 11:22:59 -0800
Pete Smith wrote: Well, I'm perplexed. My braid connections are not rigid, I used a small vacuum relay for the input side, and absolutely silent is never a term I'd use. Maybe I could have done somet
/archives//html/Amps/2003-12/msg00414.html (9,584 bytes)

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