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Total 29 documents matching your query.

1. [Amps] Cabinet needed (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Mon, 20 Nov 2006 22:29:02 -0500
Anyone have a cabinet for the SB-220 gathering dust? I need that or something of similar dimensions for a new project, the 600 watt solid state amp. from 6/06 QST. It must have a height of 8-9" and h
/archives//html/Amps/2006-11/msg00239.html (6,471 bytes)

2. [Amps] Low Pass Filters (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Sun, 3 Dec 2006 15:42:41 -0500
Greetings all, What voltage rating should be used for the caps in low pass filters following a 600 watt solid state amp? How about a KW amp? The LPFs are 5 or 7 pole Chebycheff designs just like the
/archives//html/Amps/2006-12/msg00005.html (6,450 bytes)

3. [Amps] FW: Re: current ratings (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Tue, 5 Dec 2006 13:57:12 -0500
Prompted by a few very helpful comments here on the reflector, I asked CDE about the rf current ratings of some of their dipped mica caps. Here is their response, which I hope is useful to others. 73
/archives//html/Amps/2006-12/msg00028.html (9,491 bytes)

4. [Amps] Protection circuits (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Fri, 15 Dec 2006 10:46:53 -0500
I'm building the EB104 600 watt solid state amp. described in June '06 QST. I'm concerned about operating into a high (or moderate) SWR, and thought that an SWR protection circuit would be a useful a
/archives//html/Amps/2006-12/msg00094.html (6,582 bytes)

5. Re: [Amps] Amp with MRF 154 (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Sun, 7 Jan 2007 11:23:53 -0500
For HB9JAW, Michel, I recently spoke several times to CCI when purchasing parts for the EB104 and did not have difficulties reaching them. Good luck. 73, Tony, N2UN __________________________________
/archives//html/Amps/2007-01/msg00074.html (6,624 bytes)

6. [Amps] SB200 problem (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Fri, 23 Feb 2007 18:11:24 -0500
Wonder if anyone has run into this before: I've recently had trouble loading the FT1000D into the SB200 on some bands. Even with the tuner in the 1000 on, there are times when it doesn't load properl
/archives//html/Amps/2007-02/msg00375.html (7,756 bytes)

7. Re: [Amps] Sb-200 question (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Thu, 29 Mar 2007 20:40:58 -0400
Lou, Looks like you have friends on this reflector! The old Motorola HEP catalog from 1975 shows that the HEP R0052 was the substitute for the 1N458. That was their 200piv 1A silicon diode! At least
/archives//html/Amps/2007-03/msg00399.html (7,119 bytes)

8. [Amps] EB104 (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Fri, 30 Mar 2007 21:51:10 -0400
Amps experts: Even after speaking with Roger at Communications Concepts, I can't visualize the placement of the thermistor on or under the pc board (QST 6/06 600 watt solid state amp). Can someone wh
/archives//html/Amps/2007-03/msg00412.html (6,968 bytes)

9. Re: [Amps] Amps Digest, Vol 53, Issue 25 (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Thu, 17 May 2007 19:58:31 -0400
Who in the world are you talking to, OM? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2007-05/msg00147.html (6,696 bytes)

10. Re: [Amps] attaching a heat spreader to a heat sink (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Tue, 22 May 2007 09:59:07 -0400
Dan, Please send any replys to the list. I'm in just the same stage as you are with the EB-104. The large heat sink is not exactly flat and I was wondering if a layer or 2 of aluminum foil between th
/archives//html/Amps/2007-05/msg00166.html (8,292 bytes)

11. [Amps] Fans (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Thu, 18 Oct 2007 11:18:49 -0400
Amp mavens, I'm just about finished building a 600 watt solid state amp (QST 6/06) and found an unexpected problem. The cooling fans generate lots of rf noise. They are new Orion 12vdc 4.5" fans from
/archives//html/Amps/2007-10/msg00215.html (6,949 bytes)

12. [Amps] Variable capacitor needed (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Mon, 12 Nov 2007 13:26:18 -0500
Ampers, I'm thinking about building a 1/2 gallon manual version of the EZ Tuner (QST 2002), and am looking for parts. Anyone have a dual section variable, about 19-202pf per section, they'd like to p
/archives//html/Amps/2007-11/msg00171.html (6,903 bytes)

13. [Amps] Switch needed (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Mon, 19 Nov 2007 18:53:01 -0500
Anyone have a Radio Switch #86, 2 poles, 11 positions, that they'd like to sell? Must be in fine condition. Tnx and 73, Tony, N2UN _______________________________________________ Amps mailing list Am
/archives//html/Amps/2007-11/msg00281.html (6,392 bytes)

14. [Amps] Daiwa CN-520 needed (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Wed, 28 Nov 2007 10:46:00 -0500
Anyone have a spare CN-520 they'd like to sell? It's one of the small (2 3/4" square) SWR meters with no controls on the front. Tnx and 73, Tony, N2UN _______________________________________________
/archives//html/Amps/2007-11/msg00385.html (6,456 bytes)

15. Re: [Amps] ALS-600 with ALS-600SPS SSB problem (score: 1)
Author: "tjjapha@earthlink.net" <tjjapha@earthlink.net>
Date: Sun, 2 Dec 2007 12:23:23 -0500
What circuit is it that breaks when the SWR protection triggers? It's possibly something that kicks off the power supply. And what is your SWR into your antenna? You might try adding a bypass cap. (.
/archives//html/Amps/2007-12/msg00006.html (7,603 bytes)

16. [Amps] Tubing needed (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Thu, 3 Jan 2008 14:08:20 -0500
I haven't found a source, locally or on the web, for 3/16" copper tubing needed for a short coil. I need about 2 feet total. Any ideas about a source? Or an easier to find substitute material? 1/4" t
/archives//html/Amps/2008-01/msg00030.html (7,180 bytes)

17. Re: [Amps] Warm up time for SB-200? (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Wed, 23 Jan 2008 11:35:08 -0500
There's no warmup needed for the SB-200. 73, Tony, N2UN does not say anything about it. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.c
/archives//html/Amps/2008-01/msg00158.html (7,536 bytes)

18. Re: [Amps] off topic but...... (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Tue, 29 Jan 2008 11:12:08 -0500
Hey all you birdwatchers out there. Robins are nice, but how abt. finding some sunspots? 73, Tony, N2UN Danbury,Ct. EVER seen them spot Robin is _______________________________________________ Amps m
/archives//html/Amps/2008-01/msg00235.html (9,208 bytes)

19. Re: [Amps] Think about Cycle 24 warnings from NASA... PreventiveSteps??? (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Tue, 29 Jan 2008 21:09:10 -0500
Wow! What is it: a protracted period of low cycles or a monster coming up? No one knows, which is one reason this hobby is interesting. I just missed the 1959 cycle 19 max, and can only wish for anot
/archives//html/Amps/2008-01/msg00254.html (10,311 bytes)

20. Re: [Amps] [!! SPAM] Re: SB-200 constantly keyed after flash (score: 1)
Author: "ANTHONY JAPHA" <tjjapha@earthlink.net>
Date: Sun, 16 Mar 2008 21:18:05 -0400
Larry, I'd add a comment to what Carl says: your tuneup procedure is questionable. 10 watts isn't likely to give enough of an indication of anything, and 100 watts is way to much to drive the SB200.
/archives//html/Amps/2008-03/msg00142.html (13,238 bytes)

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