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1. Re: [Amps] Amps Digest, Vol 106, Issue 7 (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Tue, 11 Oct 2011 22:08:21 +0100; I have to ask the obvious question, as I think I might have missed something here... Why remove the plate current meter? If just for the extra bit of output you get, remember. "Power is nothing witho; /archives//html/Amps/2011-10/msg00031.html (8,304 bytes)
2. Re: [Amps] running two 3 phase transformer serie/parallel (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Wed, 26 Oct 2011 09:29:47 +0100; Hi. The problem is the primaries. You'll need to either have a third transformer as a step down (from EU to US voltages) or separate the common (star) point of each transformar primary, and wire them; /archives//html/Amps/2011-10/msg00073.html (10,331 bytes)
3. Re: [Amps] RD100HHF1 work in 6m (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Sun, 20 Nov 2011 13:32:53 -0800; More like EMC issues, affecting the engine ECU, or a critical sensor, so it cut's the engine to be safe. Too much RF power for the car to safely handle. Do you realy "Need" 500W out mobile? The sort; /archives//html/Amps/2011-11/msg00090.html (7,607 bytes)
4. [Amps] (no subject) (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Mon, 21 Nov 2011 13:55:39 -0800; Hi Roger. Well, I work in EMC for my sin's, and two leading automotive test houses are our customers. Though they have many kW of power to play with for testing (that I among others are responsible t; /archives//html/Amps/2011-11/msg00099.html (15,212 bytes)
5. Re: [Amps] Making RS-4XX interfaces RF resistant (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Fri, 23 Dec 2011 11:21:37 -0800; RS422/485 is prety good, if done right, and with good quality shielded cable. At least, in our works application, it survies OK in fields genereated by a 15kW amp that it is used in (the antenna's ar; /archives//html/Amps/2011-12/msg00193.html (9,737 bytes)
6. Re: [Amps] Anti-Corona Paint ( (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Wed, 28 Dec 2011 10:59:32 -0800; Also: http://www.circuitspecialists.com/4226-55ml.html "Corona Dope" Have use this on 'scope CRT PDA circuits, where it stops 25kV leaking out! Dave G0WBX. __________________________________________; /archives//html/Amps/2011-12/msg00244.html (7,524 bytes)
7. Re: [Amps] 4CX Screen power supply (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Thu, 05 Jan 2012 07:48:17 -0800; 741's are not a good choice for the control loop, they may be internally compensated so easy to use, but the result is a shunt regulator with poor dynamic regulation, and that is what you dont need.; /archives//html/Amps/2012-01/msg00038.html (10,915 bytes)
8. [Amps] Gettering Materials (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Thu, 19 Jan 2012 17:35:05 -0800; Found this in an idle moment.... http://www.thevalvepage.com/valvetek/getter/getter.htm Enjoy! _______________________________________________ Amps mailing list Amps@contesting.com http://lists.conte; /archives//html/Amps/2012-01/msg00156.html (6,727 bytes)
9. Re: [Amps] 432 MHz stripline (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Wed, 25 Jan 2012 02:25:23 -0800; Tube installed (no extra load resistor) Lid on and all screws in and secure, no power in any way connected. Feed your sig-gen or sweeper into the PA Output jack, via a 10dB (at most) attenuator then; /archives//html/Amps/2012-01/msg00181.html (7,970 bytes)
10. Re: [Amps] Checking Power FET's (Mike & Becca Krzystyniak) (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Sat, 28 Jan 2012 13:03:45 -0800; Hi. The amp should idealy have some indication of fault status, possibly over current, or under current (with no RF). In an ideal world. Quick and simple way, so long as you can get physical access t; /archives//html/Amps/2012-01/msg00232.html (10,324 bytes)
11. Re: [Amps] Amps Digest, Vol 110, Issue 2 (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Fri, 03 Feb 2012 12:37:31 -0800; You can get some inductance reduction, by wrapping the resistor with copper foil, soldering it so it makes one huge shorted turn, somewhat reducing the inductance. But it often compromises the coolin; /archives//html/Amps/2012-02/msg00002.html (9,776 bytes)
12. Re: [Amps] HD HF amplifier recommendations (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Fri, 10 Feb 2012 04:58:30 -0800; Hehehe... Re:- The 4 cylinder will do the practical job that an automobile fulfills, but it won't do 160 mph top end or go zero to sixty in 4 or 5 seconds. There are 4 pot Turbo Diesel's here in the; /archives//html/Amps/2012-02/msg00086.html (8,604 bytes)
13. Re: [Amps] GPT-750 power supply (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Fri, 10 Feb 2012 04:58:35 -0800; Re the smart bleeder. Cascode two or more HV Power Fet modules, Drain to Source etc, and use resistors to set the individual gate voltages for the upper FET's so they (more or less) share the load. T; /archives//html/Amps/2012-02/msg00087.html (8,187 bytes)
14. Re: [Amps] warbleing gi-7 (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Mon, 13 Feb 2012 01:38:55 -0800; More like RF getting back into the Mic line ("Breakthrough") the usual problem at VHF when you start throwing larger ammounts of RF about, than you have in the past.. Regardless of if he run's SSB,; /archives//html/Amps/2012-02/msg00122.html (7,890 bytes)
15. Re: [Amps] Source for plate xfrmer (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Thu, 16 Feb 2012 06:51:40 -0800; Well, I wanted a single cap and a regulated supply. Too much? I mentioned having it partly for a sanity check. I have a friend who once built a 4x1 amp with a 6 KV supply. When he fired it up he got; /archives//html/Amps/2012-02/msg00197.html (9,145 bytes)
16. [Amps] 9500 Mostly Running Again - Sort Of (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Sat, 18 Feb 2012 13:14:33 -0800; You could use a VPN, and redirect the com-port or USB (or whatever) that the amp is hung on, down the VPN to appear as a virtual port for the Dashboard software running on your remote PC. For Serial; /archives//html/Amps/2012-02/msg00224.html (7,989 bytes)
17. Re: [Amps] Buying Stolen Tubes? (score: 1): Author: "Dave" <dave@g8kbv.demon.co.uk>; Date: Mon, 12 Mar 2012 02:36:09 -0800; Probably not, but not because of any "shady" history as documented, I did read the story, plausable but no proof. But anyway. I wouldnt buy that one purely because I do not know how carefully it was; /archives//html/Amps/2012-03/msg00137.html (8,256 bytes)

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