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1. [Amps] YC-156 Triode (score: 1)
Author: "k7rdx" <>
Date: Thu, 8 Sep 2005 07:31:37 -0700
I would like to converse with anyone who has built around the yc-156 re: workable plate voltage,input impedance,typical use on hf bands,warm up time,etc..Please reply off list directly...Thanks,Jim..
/archives//html/Amps/2005-09/msg00073.html (6,176 bytes)

2. Re: [Amps] YC-156 Triode (score: 1)
Author: "k7rdx" <>
Date: Thu, 8 Sep 2005 20:38:02 -0700
That sounds typical of some of thr Russian triodes too...I read somewhere a few yrs ago of a conversion to GI7B`s in a MLA-2500 . The guy had a ac hum on the audio as well as when keyed with no drive
/archives//html/Amps/2005-09/msg00081.html (8,680 bytes)

3. Re: [Amps] stepper motors (score: 1)
Author: "k7rdx" <>
Date: Thu, 15 Sep 2005 17:44:01 -0700
Something Tomm might not know: The Russian vacuum variable caps may have a diffrent turns ratio(Less turns for more/less C) than other brands like Jennings,etc.This could affect the final gear ratio
/archives//html/Amps/2005-09/msg00132.html (10,014 bytes)

4. Re: [Amps] Drying out HV transformers / Chokes (score: 1)
Author: "k7rdx" <>
Date: Sun, 18 Sep 2005 06:09:45 -0700
How much heat(Can your meter handle) and for how long can your AC meter be used for this?Vacuum impregnation with polyester varnish is the modern way to restore/protect open frame transformers...Jim.
/archives//html/Amps/2005-09/msg00205.html (10,491 bytes)

5. Re: [Amps] AC wiring (score: 1)
Author: "k7rdx" <>
Date: Mon, 17 Oct 2005 20:32:15 -0700
I have a friend who builds high end audio amps..He even powder coats the chassis and clear coats every component before assembly...His price range is in the 10k plus figure...Seems the high end audio
/archives//html/Amps/2005-10/msg00440.html (9,151 bytes)

6. [Amps] DTR-1200L (score: 1)
Author: "k7rdx" <>
Date: Fri, 21 Oct 2005 19:14:30 -0700
Does anyone have the Dentron spec sheet with info such as: Inductor/Capacitor values for tuned input board when adding 10m to the DTR-1200L amp? Please reply off list,thanks Jim. ____________________
/archives//html/Amps/2005-10/msg00525.html (6,326 bytes)

7. [Amps] HT-58 Seres caps (score: 1)
Author: "k7rdx" <>
Date: Sun, 6 Nov 2005 14:42:00 -0800
Would anyone on the list have (2) HT-58 500pf/5kv ceramic doorknobs they might sell me? Please reply off list..Thanks, Jim K7RDX _______________________________________________ Amps mailing list Amps
/archives//html/Amps/2005-11/msg00081.html (6,113 bytes)

8. [Amps] Tubes/V var. for sale (score: 1)
Author: "k7rdx" <>
Date: Mon, 28 Nov 2005 21:09:11 -0800
For sale: 2 new GS-35b in foam boxes/hipot tested cold to 6kv. 175.00 for pair plus shipping chgs.Or 90.00 each.UCS-200/10KV 60.00, UCS-300/10KV 100.00. Want:YC-156 at reasonable price... Thanks and
/archives//html/Amps/2005-11/msg00513.html (6,246 bytes)

9. Re: [Amps] Tubes/V var. for sale (score: 1)
Author: "k7rdx" <>
Date: Wed, 30 Nov 2005 06:52:11 -0800
The tubes have been sold,thanks to all that responded..The vacuum variables are still availiable,as is the want for a yc-156 tube. Thanks agn, Jim.. -- Original Message -- From: k7rdx To: Amps Amps S
/archives//html/Amps/2005-11/msg00522.html (7,043 bytes)

10. Re: [Amps] Want to use a knob with a 3/8" opening on a 1/4" shaft. (score: 1)
Author: "k7rdx" <>
Date: Fri, 23 Dec 2005 10:10:07 -0800
Most bearing supply outlets will have various bushings in stock...1/4-3/8 is a common size, another source is an industrial machine shop..(It helps to have a friend that does this kind of work) Hope
/archives//html/Amps/2005-12/msg00311.html (9,916 bytes)

11. Re: [Amps] Calibrate a panel meter? (score: 1)
Author: "k7rdx" <>
Date: Wed, 28 Dec 2005 10:54:12 -0800
If it`s reading low..Oil it! Tee Hee...Actually you need to take it apart and adjust the internal shunt...Some of the Weston meters I have seen are internally shunted with resistance wire...Perhaps S
/archives//html/Amps/2005-12/msg00358.html (8,359 bytes)

12. Re: [Amps] Westinghouse BC Ammeter QX-37 (score: 1)
Author: "k7rdx" <>
Date: Mon, 9 Jan 2006 08:36:30 -0800
Most of the better commercial people are also hams...At least here in the USA...Jim.. -- Original Message -- From: "Bill Turner" <> To: "k7fm" <>; "Steve Thomps
/archives//html/Amps/2006-01/msg00271.html (11,034 bytes)

13. Re: [Amps] GS-35B Vertical Mounting & Input Impedance (score: 1)
Author: "k7rdx" <>
Date: Thu, 12 Jan 2006 09:04:06 -0800
Does anyone have any history on the GS-7b? I have a few here and have been testing them in one of the decks I built for a Op here.. The tube I was told has close specs to GS-35b and from our testing
/archives//html/Amps/2006-01/msg00358.html (11,127 bytes)

14. Re: [Amps] Super buy on the Bay! (score: 1)
Author: "k7rdx" <>
Date: Fri, 3 Feb 2006 11:05:53 -0800
There must be a gadzillion of these amps out there...One of my friends brought an amp like this to get checked out...No name on it but it looked just like the one in the ebay auction...Except it had
/archives//html/Amps/2006-02/msg00054.html (8,637 bytes)

15. Re: [Amps] Here's something you don't see every day (score: 1)
Author: "k7rdx" <>
Date: Tue, 14 Feb 2006 10:15:07 -0800
It`s easy to put five tubes in this small box if you remote the hvps and I would guess the "Tank' is probably only four turns with small value caps...What a way to ruin a nice SB-220..BTW, I recently
/archives//html/Amps/2006-02/msg00259.html (9,197 bytes)

16. Re: [Amps] A question - Clipperton L (score: 1)
Author: "k7rdx" <>
Date: Thu, 16 Feb 2006 19:59:53 -0800
Wasn`t the FL-1 a band pass/band reject filter to limit operation below 10 meters? If I remember correctly you have to delete this filter when adding 10 meters to this amp. Jim K7RDX -- Original Mess
/archives//html/Amps/2006-02/msg00302.html (9,067 bytes)

17. Re: [Amps] QSK (score: 1)
Author: "k7rdx" <>
Date: Thu, 23 Feb 2006 10:00:12 -0800
I think everyone should go to keyboard cw...At least the poor sending would be history. Hamscope has a great psk/cw program and it even de-codes some of the sloppy fists...Break-in might be a bitch t
/archives//html/Amps/2006-02/msg00451.html (11,820 bytes)

18. [Amps] Question abt YC-156/3CPX5000A7 (score: 1)
Author: "k7rdx" <>
Date: Thu, 23 Feb 2006 14:04:56 -0800
Have just finished hipot testing a yc-156...Pulls 15 micro-amps between plate and grid at 13kv...Is it risky to pop this in the deck(6kv) and check the output or is it likely gassy and might flashove
/archives//html/Amps/2006-02/msg00468.html (7,048 bytes)

19. Re: [Amps] HB Amps (score: 1)
Author: "k7rdx" <>
Date: Sat, 4 Mar 2006 11:03:35 -0800
The GS-35b would be the most logical choice for price,ease of assembly, and power output. The tube works just as well on 10 meters as on 160 and well into vhf/uhf. You do need a capable PSU..The thin
/archives//html/Amps/2006-03/msg00068.html (9,995 bytes)

20. Re: [Amps] Transformers in series (score: 1)
Author: "k7rdx" <>
Date: Sun, 12 Mar 2006 07:48:54 -0800
And if unsure about phasing always bring the voltage up slowly with a variac while monitoring the secondary voltage. If the phasing is correct output will show with a small value of input...Jim.. --
/archives//html/Amps/2006-03/msg00289.html (10,392 bytes)

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