- 1. [Amps] Fingerprints on 3Z500 tubes (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Mon, 28 Feb 2005 22:45:22 +0100
- Should I worry about not getting fingerprints on the glass of glass-enclosure tubes like the 3Z500? Should this have happened, what would be the best way to wipe them? Geert Jan _____________________
- /archives//html/Amps/2005-02/msg00931.html (6,292 bytes)
- 2. Re: [Amps] RF Parts is still in business (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Wed, 02 Mar 2005 22:09:13 +0100
- I ordered a pair of 3-500's on Feb 9. They were shipped on Feb 15 and arrived safely earlier this week (and note that's the Netherlands, so postal takes time). So they were alive and kicking 2 weeks
- /archives//html/Amps/2005-03/msg00020.html (6,919 bytes)
- 3. Re: [Amps] 600 Watt Solid State Amp Project (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Mon, 27 Jun 2005 10:28:37 +0200
- Rumor has it that Elecraft is working on something. It's not announced yet but word on the elecraft list is that a prototype has been demo-ed at some show. There is talk about a 600W-with-tuner and
- /archives//html/Amps/2005-06/msg00257.html (7,798 bytes)
- 4. [Amps] Specification for 3-500 grounded-grid grid bypass caps? (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Fri, 15 Jul 2005 11:30:03 +0200
- For restauration work on a SB220 I'm looking for specs of suitable replacement caps for the grid bypass. In the SB220, each of the three grid-pins is connected by a 200p mylar cap to ground. mylar ca
- /archives//html/Amps/2005-07/msg00162.html (6,866 bytes)
- 5. Re: [Amps] RFI - Small Home Network? (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Sun, 05 Feb 2006 15:40:39 +0100
- In addition to the suggestions already given, if you're using cat5, suggest you try 10 mbit ethernet (10BASE-T) rather than 100 mbit. 10 mbit ethernet uses manchester encoding and hence only causes
- /archives//html/Amps/2006-02/msg00106.html (7,795 bytes)
- 6. Re: [Amps] Transformer question (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Mon, 09 Jul 2007 23:22:43 +0200
- I'm obviously no expert in the American electrical code (other than some of the stunts I see posted would be definite no-go tricks over here). On the other hand, 230 volts is all we have, we do get t
- /archives//html/Amps/2007-07/msg00127.html (9,712 bytes)
- 7. Re: [Amps] Future of RF AMPS (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Wed, 11 Sep 2013 23:10:24 +0200
- I would also look at other devices. For instance, NXP produces a number of devices (like the BLF578XRS) where a single device produces up to 1400 watts, up to 500 MHz. The selling factor is that the
- /archives//html/Amps/2013-09/msg00048.html (8,592 bytes)
- 8. [Amps] Looking for picture of SB220 interlock switch (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Wed, 06 Nov 2013 10:07:59 +0100
- I'm preparing to start on an SB220 renovation project: replace capacitors, update diode board, etc The previous owner has disbled the safely interlock by bending the brass strip away and removing the
- /archives//html/Amps/2013-11/msg00058.html (7,055 bytes)
- 9. [Amps] Trio CO-1303G schematic sought (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Thu, 27 Mar 2014 23:08:43 +0100
- Apologies if this is only sideways on topic, but I'd expect most amp-users to monitor the output of their amp using a station monitor/scope/... The Trio CO1303G is a special version of the 1303 scope
- /archives//html/Amps/2014-03/msg00175.html (7,230 bytes)
- 10. Re: [Amps] SB220 step start blows fuses (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Sun, 23 Jul 2017 23:23:20 +0200
- Sorry for raking up an older topic; I don't always have time to keep up with mail. In the whole discussion, what I did not see is that the power supply of the SB220 is lineair. I have used this to my
- /archives//html/Amps/2017-07/msg00090.html (8,954 bytes)
- 11. Re: [Amps] Fil transformer (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Sun, 13 Aug 2017 14:19:06 +0200
- I'm not sure if any kind of AC transformer is of any help? The way I have seen this done is that there is an RF choke between the AC transformer and the filament on both filement wires. This de-coup
- /archives//html/Amps/2017-08/msg00016.html (8,565 bytes)
- 12. Re: [Amps] Distilled water in a dummy load ? (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Sun, 21 Feb 2021 21:35:48 +0100
- Is it possible to use distilled water in a hb dummy load ? DL consist of 4 x 200 ohm globars, wired in parallel..in an 8 gallon container. I welded 4 x 3 inch OD thick wall Alum pipes together, 2 sta
- /archives//html/Amps/2021-02/msg00025.html (8,596 bytes)
- 13. Re: [Amps] 300Hz sidebands (score: 1)
- Author: Geert Jan de Groot <pe1hzg@xs4all.nl>
- Date: Mon, 24 May 2021 19:52:44 +0200
- Apologies for asking, but have you tried a different driver transceiver to see if the signal (level and/or frequency) changes? Geert Jan _______________________________________________ Amps mailing l
- /archives//html/Amps/2021-05/msg00054.html (7,602 bytes)
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