SB-201 no plate, high grid

[Jan Ditzian]

I have an SB-201 that I am trying to resurrect.  I just replaced a blown 
(no filament) 572B tube with a new one, and I replaced some burned 
components at the socket of one of the tubes.  When I turn it on the 
tubes light and I see high voltage in the HV position.  The T/R relay 
operates.  However, with the exciter set to no drive, dummy load in 
line, when I go to transmit there is no resting plate current and the 
meter pins in grid position.  I only operated the T/R switch a few 
times, for about a second each time, but I do not want to do this again 
until I understand what might be happening.

Can someone give me guidance about what I should look for as the 
problem?  It may still be something at the tube sockets, but I would 
appreciate a voice of experience telling me what to look for next.

Thank you,

Jan, KX2A

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://listserv.tempe.gov/archives/HEATH.html