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Total 24 documents matching your query.

1. [Amps] 30L-1 Blows Fuse at 600ma (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Sun, 19 Nov 2006 22:40:33 -0500
Running a 30L-1 with a Collins 32S- exciter at 80-90w. The 30L-1 tunes up fine at low-power (20-30w) but as exciter output is increased and the 30L-1 reaches 600ma plate current it blows it's 8a HV f
/archives//html/Amps/2006-11/msg00234.html (6,746 bytes)

2. [Amps] Collins 30L-1 Bouncy Meter (score: 1)
Author: jsternmd <jsternmd@earthlink.net>
Date: Mon, 27 Nov 2006 17:16:14 -0500 (GMT-05:00)
I have a 30L-1 with a real "bouncy" meter. When switching from DC volts (~1900V) to either Tune or DC Amps, the meter swings down to about minus 400-600v before coming back to rest at Zero. Also, whe
/archives//html/Amps/2006-11/msg00268.html (6,972 bytes)

3. [Amps] Buying Amp (score: 1)
Author: jsternmd <jsternmd@earthlink.net>
Date: Wed, 29 Nov 2006 12:44:16 -0500 (GMT-05:00)
Hi Group, I am impressed with the feedback from ACOM 1000, Tokyo HighPower's HL-1.5FX and ICOM IC-PW1. Anyone have any strong opinions expecially with regards to design and secondarily serviceability
/archives//html/Amps/2006-11/msg00273.html (6,521 bytes)

4. [Amps] Follow-up on Bouncy Meter (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Sat, 2 Dec 2006 09:53:06 -0500
Hi Group, Thanks for the advice on the bouncy meter. After removing it from the amp - it is clear that this is a mechanical issue. When the meter is out of the amp physically and gently turned right
/archives//html/Amps/2006-12/msg00002.html (7,010 bytes)

5. [Amps] SPE 1Kw Linear (score: 1)
Author: jsternmd <jsternmd@earthlink.net>
Date: Wed, 6 Dec 2006 00:17:27 -0500 (GMT-05:00)
Hi Group, Anyone know anything about the SPE 1Kw Expert linear from Italy? The specs and price on the amp sound too good to be true. Does anyone have any first hand information on its design, perform
/archives//html/Amps/2006-12/msg00034.html (6,564 bytes)

6. [Amps] Optoisolator for Keying Collins 30L-1 to Modern Rigs (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Fri, 8 Dec 2006 20:53:38 -0500
Hi Group, I want to key my 30L-1 with my Kenwood TS-950SD. The 30L-1 antenna relay has -170v relative to chassis ground and required grounding. My TS-950SD amp relay cannot handle that. I have seen 2
/archives//html/Amps/2006-12/msg00045.html (6,907 bytes)

7. Re: [Amps] Optoisolator for Keying Collins 30L-1 to Modern Rigs (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Sat, 9 Dec 2006 10:14:39 -0500
Dear Tom, Thanks for the clear and detailed answer. I impulsively bought the Ampkeyer recently which really is a great value and beautifully constructed. But the Ampkeyer manual says not to use the M
/archives//html/Amps/2006-12/msg00048.html (10,533 bytes)

8. [Amps] 30L-1 filter caps (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Wed, 13 Dec 2006 21:18:19 -0500
I have spent a lot of time in researching 30L-1 power supply options. The one step solution is to use the single board (combines diodes and filter caps) from Wn4i, Yves (Steve) Pautard, 5833 Dryden r
/archives//html/Amps/2006-12/msg00085.html (12,594 bytes)

9. [Amps] Strange SWR (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Sat, 16 Dec 2006 13:47:00 -0500
OK, first this is an off-topic post but you guys seem to be the sharpest guys on the block. While tuning up my 30L-1 amp into a good quality 50ohm dummy load (Palstar DL2K) - I inadvertently left the
/archives//html/Amps/2006-12/msg00106.html (7,361 bytes)

10. [Amps] Alpha 87a (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Sun, 31 Dec 2006 16:35:16 -0500
Hi All, I just got an ETO Alpha 87a with Alphamax and it seems to work very nicely. I only see one problem with the amp - I'm almost certain that the RF input coils for many of the bands need to be a
/archives//html/Amps/2006-12/msg00238.html (7,681 bytes)

11. Re: [Amps] Alpha 87a (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Sun, 31 Dec 2006 16:38:30 -0500
Oops, I forgot to mention that all measurements were made with the 87a into a 50 ohm dummy load and the reflected power LEDs on the 87a stayed at zero through the testing I described. 73 Jerry K1JOS
/archives//html/Amps/2006-12/msg00239.html (7,742 bytes)

12. [Amps] Alpha 87a High SWR between Exciter and Amp vs Bad Bandswitch (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Tue, 2 Jan 2007 22:52:05 -0500
Hi Mike, Hi Group, Well I did the experiments and it was interesting. The best coax length I found was 20 feet and I made the mistake of cutting it further back to 19.5 then 19 only to see things det
/archives//html/Amps/2007-01/msg00033.html (28,456 bytes)

13. Re: [Amps] Alpha 87a High SWR between Exciter and Amp vs BadBandswitch (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Tue, 2 Jan 2007 23:35:38 -0500
Hi Mike, When I said the 87a "autotunes" what I meant was I would set the band setting on the 87a to lets say 10m or 15m and then I would xmit on 80m and the 87a would "autotune" = auto-bandswitch ba
/archives//html/Amps/2007-01/msg00034.html (10,254 bytes)

14. [Amps] Alpha 87a 3CX800A7 replacement (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Sun, 25 Feb 2007 00:11:10 -0500
I'm looking for spare 3CX800A7 's just in case for future needs, I noted the warning on the Alpha website about not using just any 3CX800A7 but only specially screened tubes for low grid current. Any
/archives//html/Amps/2007-02/msg00381.html (6,385 bytes)

15. [Amps] Alpha 87a with Palstar AT-AUTO Tuner (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Sat, 31 Mar 2007 23:54:43 -0400
Hi Group, Recently had my Alpha 87a checked out at Alpha and working great. I got a Palstar 1.5kw autotuner and it has been working well with the Alpha where I would first autotune under low power an
/archives//html/Amps/2007-03/msg00422.html (6,990 bytes)

16. [Amps] Sequencing an Alpha 87a (score: 1)
Author: jsternmd <jsternmd@earthlink.net>
Date: Tue, 22 May 2007 17:18:11 -0400 (GMT-04:00)
Hi All, Recently there have been reports of a number of PA failures in recent manufactures of the ICOM IC-7800. Reasons are unclear but one concern is poor sequencing when the IC-7800 may be keying a
/archives//html/Amps/2007-05/msg00177.html (7,335 bytes)

17. Re: [Amps] Solid state Vs Tube QRO (score: 1)
Author: jsternmd <jsternmd@earthlink.net>
Date: Mon, 23 Jul 2007 19:10:38 -0400 (GMT-04:00)
Phil, Re: the SPE-1K antenna autoswitching. Do you think there may be a concern where you may see very transient high SWR back to the "hot" exciter finals while the amp switches antenna input? There
/archives//html/Amps/2007-07/msg00387.html (32,971 bytes)

18. [Amps] Testing 3CX800A (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Tue, 14 Aug 2007 13:07:41 -0400
Hi All, I just bought a 3CX800A as a spare for my Alpha 87A. It was reportedly bought new several years ago as a spare for an Alpha 76PA and tested once in that amp and then stored. I'm a wuss becaus
/archives//html/Amps/2007-08/msg00079.html (6,646 bytes)

19. [Amps] Alpha 87A Mic Click Grid Current Spike (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Thu, 8 Nov 2007 18:10:17 -0500
Just noticed that when I PTT on my mic that my Alpha 87A Grid current always shows a momentary spike of about 70ma. This happens even if I have the output of my tranceiver set to zero. I rarely see G
/archives//html/Amps/2007-11/msg00115.html (25,113 bytes)

20. Re: [Amps] Alpha 87A Mic Click Grid Current Spike (score: 1)
Author: "JOS Earthlink" <jsternmd@earthlink.net>
Date: Thu, 8 Nov 2007 19:02:21 -0500
Hi Paul, Thanks for the short-cut. I first checked the output of my ICOM xcvr to make sure that there wasn't any RF spike with power knob down to zero on a sensitve powermeter with peak hold and all
/archives//html/Amps/2007-11/msg00117.html (8,389 bytes)

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