[Heathkit] Thanks to all

[randy perkins]

Hi Glen,
Yes, I am powering the VF-1 from the AT-1. My AT-1 has a little beefier power supply than stock. Also, I have done the mods to the VF-1 with the OB2 and the 6AH6. I have good stability like it is but I like your idea of the external power supply. It would be a simple matter to build up a small external 150 volt regulated PS. Good idea.
Thanks, Randy, w5kcm




________________________________
From: Glen Zook <gzook at yahoo..com>
To: heathkit at mailman.qth.net; randy perkins <w5kcm_randy at verizon.net>
Sent: Thu, January 21, 2010 10:06:14 AM
Subject: Re: [Heathkit] Thanks to all

Are you powering the VF-1 from the AT-1?  If so, this isn't really a good idea.  Power the VF-1 from an external 150 volt regulated supply, change the 0A2 screen regulator tube to an 0B2, and then replace the 6AU6 oscillator tube with a 6AH6.  No wiring changes are needed.

The VF-1 will be much more stable and the AT-1 will be MUCH happier.

Glen, K9STH

Website:  http://k9sth.com


--- On Thu, 1/21/10, randy perkins <w5kcm_randy at verizon.net> wrote:

Hi Buck, I have a restored AT-1 and with the crystal (80 Meters) I get about 9 to 10 watts output. With the VF-1 VFO, I only get about 6 to 8 watts output. I tried several 6L6's and have the same results. My power transformer is not original and the B+ is a little lower than it should be. This is most likely why my output is not that great but still in the normal range. If I solid state the rectifier, I can get about 15 watts output. I tried to keep it mostly original, so I kept the 5U4 tube in there. Glad to see more AT-1's on the air.