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Total 31 documents matching your query.

1. [Amps] 3-500Z socket types (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Wed, 29 Dec 2004 19:34:43 +0000
I have a very early Amp Supply Co. LK-550 which uses three 3-500Zs. I have had recurring problems with getting all three bottles to "light up" when I power up. The problem appears to be excessive res
/archives//html/Amps/2004-12/msg00386.html (7,879 bytes)

2. [Amps] SB-220 and 50Hz and more (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Tue, 11 Jan 2005 15:48:45 +0000
Just to conclude the power line frequency discussion, I have my SB-220 and original manual from 1977, when I built the kit. There are two references to power line frequency in the manual: 1. [page 3]
/archives//html/Amps/2005-01/msg00204.html (11,871 bytes)

3. [Amps] Re: Why price difference/30S1 (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Thu, 03 Feb 2005 22:47:30 +0000
Expanding on W9GE's list, here's what I've come up with over the years as to why I might want a newer amp: 1. I want to run the amplifier on 160. 2. I want to run an amplifier on the WARC bands (that
/archives//html/Amps/2005-02/msg00058.html (8,313 bytes)

4. Re: [Amps] Shipping Damage (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Thu, 24 Feb 2005 21:30:32 +0000
They may "guarantee" 5 days, but they failed to deliver in my situation two weeks ago. The 4-pound electronics item I had ordered sat in a Texas FedEx facility for the first day and a half, was on th
/archives//html/Amps/2005-02/msg00779.html (9,561 bytes)

5. Re: [Amps] AL-1200 vs AL-1500 (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Fri, 25 Feb 2005 14:24:36 +0000
Perhaps. But the SB-220/SB-221 is 175, with far less variability than the homebrew class. Bud, W2RU _______________________________________________ Amps mailing list Amps@contesting.com http://lists.
/archives//html/Amps/2005-02/msg00801.html (8,123 bytes)

6. [Amps] MOT MDA1333H (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Mon, 09 May 2005 01:42:13 +0000
According to my Motorola Semiconductor Data Library, the MDA1333H is a "Rectifier Assembly". Material: Silicon Master Reference Device: MDA1330H (Controlling Data Sheet, in other words) V-rrm = 10,0
/archives//html/Amps/2005-05/msg00142.html (8,101 bytes)

7. [Amps] MOT MDA1333H -- more (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Mon, 09 May 2005 01:50:43 +0000
I now have the full 4-page spec sheet in front of me, if there are any specific questions. That I-o of 2.5 amps, by the way, is "Average Half Wave Rectified Forward current (Resistive Load, 180-degre
/archives//html/Amps/2005-05/msg00143.html (6,920 bytes)

8. [Amps] MOT MDA1333H -- postscript (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Mon, 09 May 2005 01:55:15 +0000
Whoopee !!! Wait 'til I tell my wife that all this stuff I've been hanging on to for the past 150 years has a purpose! Bud, W2RU _______________________________________________ Amps mailing list Amps
/archives//html/Amps/2005-05/msg00147.html (6,275 bytes)

9. Re: [Amps] Kon-Tiki (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Sat, 03 Sep 2005 01:15:08 +0000
Early in his book Heyerdahl writes about "...the transmission, which was to be done partly with short-wave transmitters specially constructed for our purpose and partly with secret sabotage sets used
/archives//html/Amps/2005-09/msg00011.html (7,977 bytes)

10. Re: [Amps] Kon-Tiki (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Sat, 03 Sep 2005 13:51:25 +0000
Yes, those are probably the last-mentioned transmitters in the following additional text from December 1947 QST: "Other equipment...included a hand-cranked emergency set of the Gibson Girl type for 5
/archives//html/Amps/2005-09/msg00019.html (9,187 bytes)

11. Re: [Amps] Alpha releases New Amp 9500 (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Wed, 21 Sep 2005 17:48:38 +0000
Most desktop PCs in the chain stores these days have had ONE RS-232 and ONE parallel port. The latest laptop (Acer) here has NO RS-232 and NO parallel port. Trade journals make it clear that these (b
/archives//html/Amps/2005-09/msg00268.html (9,849 bytes)

12. Re: [Amps] Alpha releases New Amp 9500 (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Thu, 22 Sep 2005 13:25:11 +0000
No disagreement with you there -- I'm not a programmer, but even as a user I see a number of software-related advantages to USB. On the other side of the coin, three reasons of importance to me today
/archives//html/Amps/2005-09/msg00285.html (10,336 bytes)

13. [Amps] One PS, many amps (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Thu, 06 Oct 2005 19:33:36 +0000
Years -- no, that's not quite right -- decades ago, W1MX used just such a system. We had a bunch of HF monoband push-pull 304TL amplifiers tied to a single HV supply. We had a single Collins exciter.
/archives//html/Amps/2005-10/msg00159.html (7,892 bytes)

14. Re: [Amps] lk550 plate efficency (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Fri, 06 Jan 2006 12:21:14 +0000
I have LK-550 S/N 001. Given its serial number, I'd hesitate to call my amplifier "stock" <G>, and it may be nothing like yours, but I found it necessary to add some capacitance in the output pi-netw
/archives//html/Amps/2006-01/msg00207.html (7,515 bytes)

15. Re: [Amps] NEC-think. (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Sat, 07 Jan 2006 16:43:40 +0000
I believe the correct spelling is "gnaw".... _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2006-01/msg00246.html (8,505 bytes)

16. Re: [Amps] RFI - Small Home Network? (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Sun, 05 Feb 2006 04:23:49 +0000
My recommendation -- Use an 802.11g wireless LAN. I used to have CAT5 Ethernet for my 5 desktop PCs, but the long ethernet cables act as antennas for the circuitry in the router / switch, and you win
/archives//html/Amps/2006-02/msg00097.html (10,492 bytes)

17. Re: [Amps] QSK (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Thu, 23 Feb 2006 03:04:20 +0000
Although I've used QSK from the very beginning of my on-air activities a half-century ago, and feel like I'm blindfolded if I don't have it, I've known many excellent operators who didn't use it. A p
/archives//html/Amps/2006-02/msg00418.html (11,484 bytes)

18. Re: [Amps] QSK (okay, not QSK...) (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Fri, 24 Feb 2006 16:14:25 +0000
While the above statement is true in principle, it's not always attainable in practice. Many popular transceivers, including the Kenwood TS-940 and TS-950SDX which I have dug into quite a bit, energi
/archives//html/Amps/2006-02/msg00501.html (12,958 bytes)

19. Re: [Amps] Transformers in series (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Sun, 12 Mar 2006 03:56:25 +0000
I'm not sure Rex said exactly what he meant to say. You can put primaries in series and secondaries in parallel, or vice versa, depending on what voltages in and out you're trying to accomplish with
/archives//html/Amps/2006-03/msg00278.html (8,957 bytes)

20. Re: [Amps] RF probe and SSB (may be a little OT) (score: 1)
Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>
Date: Sun, 12 Mar 2006 04:14:48 +0000
Hardly off topic. Not enough users of amps worry about the quality of their audio. One of the best ways of checking the effect of your amplifier tuning on your signal quality is to use a "monitor" sc
/archives//html/Amps/2006-03/msg00279.html (10,863 bytes)

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