|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
152.163.101.12
In Reply to: Re: Vintage Pilot 260 posted by Edmund on April 12, 2007 at 22:25:05:
I installed 2 jumpers installed on the preamp socket. One jumper bypases the on off switch. The other puts resistors in paralell with the power supply to compensate for the increased voltages caused by not powering the preamp. This was not clearly shown on the Sams Photofact diagram as I recall.
Follow Ups:
AI,
You are absoultely right in this issue, I omitted that part. I will put that two 15K 2W resistors back and measured the voltage again. Whether or not to put that two 375 ohm 10W parallel connected resistors back will depend.
All H+ voltages are normal after I connected two 15K 10 W resistors back to the circuit and with all tubes in place.
Thats a good thing. Next try this amp with a passive preamp.
This post is made possible by the generous support of people like you and our sponsors: