Yes, that is a 'trim' cap and should be less than 10 pF or so. It's not likely to have much effect
on the stability of the oscillator. More likely are the caps on the 'other' side of the board,
shown further down, the two brown tubular caps to the left of the Diode D13 are 45 pF each. That's
probably a 'C-Line' Version 7 PTO. Probably a result of either a better buy on two 45 pF caps over
a single 90 pF, or a mechanical rearrangement of the board layout. Those two caps are the most
critical as far as stability of the oscillator is concerned.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Eddy Swynar wrote:
Hi Guys,
For a look-see at the suspect tubular capacitor that I am referring to in my
T-4X PTO, go to this website:
http://www.wb4hfn.com/DRAKE/DrakeArticles/TechTips/PTO-Repair.htm
Scroll down half the page to where you see the heading "ELECTRICAL FAILURES": the
photograph with the arrowed inscription marked "solder point" is immediately left of the
white tubular capacitor that I am referring to...
~73~ de Eddy VE3CUI - VE3XZ
_______________________________________________
Drakelist mailing list
Drakelist@zerobeat.net
http://mailman.zerobeat.net/mailman/listinfo/drakelist
