I pulled up the subscriber list yesterday...there are some 425 subscribers to "AMPS." Since I am no spring chicken, and did not just fall off the turnip truck onto this reflector, I think I can safel
Hi Phil: My answer is: (g) - not sure. G2DAF would be the only person who could properly respond, and he has been on a dx-pedition for years. Unfortunately, the G2DAF amplifier is not of sufficient p
A regulated screen supply for an 8171. takes a approx. 1200v, 100mA power transformer, rectifiers, C-filter, a 723 IC, a hexfet, a SCR and a few small components. This takes perhaps $35 for swap-mee
Please name one. thanks A screen or bias supply in a g-g amplifier? [chortle] - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions:
Let G2DAF speak for himself - you can download his original articles from my web site. 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book' 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.com
The QBL 5/3500 does not work in GG, believe me. Could it be because it is not an Eimac tube... ? The world seems to spin around Eimac. Peter/SM2CEW -- FAQ on WWW: http://www.contesting.com/ampsfaq.ht
In my case, f. Wanted to use a tube that did not work in GG, without having to build the screen/grid supplies. Plus the fact that the tube is easy to drive with the DAF circuit, in my case 35W in giv
According to the data sheet, the QBL 5/3500... works well in AB grid-driven service. It should do about 3 out. With a 50-ohm grid termination, 170w will drive one. cheers, Peter - Rich..., 805.386.3
I was surprised to see that G2DAF had a circuit using 4X150As. The 4CX250A that Norm used in his DAF amplifier is very similar, yet Norm was criticized for using the wrong tube. cheers, Ian - Rich..
''Everything is more complicated than it looks''. - Murphy - - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.c
Well, it has been tried, with no success. Could be that then the tubes were used and had little emission left as they were pulls from FM transmitters. A new tube might work. But 170W i a 'lotta' driv
With a grid bias of c. 120v in Class AB and a 50-ohm termination resistor, 170w is what it takes to make a bit of grid current. . The 170w goes mostly into the termination. later, Peter - Rich..., 8
I read the original article, Ian. Thanks. Thornley makes no mention of how he managed to get around the 3/2-power law. Also, there is no mention about the grid/screen phase difference problem. My gu
--Original Message-- From: measures <2@vc.net> To: Phil Clements <philk5pc@tyler.net>; Steve Thompson <rfamps@ic24.net>; AMPS <amps@contesting.com> To: <amps@contesting.com> Date: 26 March 2000 19:39
To: <amps@contesting.com> ¿Say what.? I train no one. later, Steve - Rich..., 805.386.3734, www.vcnet.com/measures. end -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps
To: <amps@contesting.com> ¿Say what.? Section 2.2 of 'Care and feeding..' I don't have my copy to hand at this computer for the page reference, but you can find it on their web site version. I