"Hubert ROTH" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Thank you Garrey
Strange strange 1.6V pp I have that!! I will have to remeasure that; but
looks like ther is another issue !!! I've read something about a diode on
the PTO Xtal mixer between plate and screen. BTW I had 620pF and changed to
390pF.
Looks like if I fixed the PTO and after remounting something other fails. Oh
murphy!!
73,s Hubert F6DUK
----- Original Message -----
From: "Garey Barrell" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Sunday, August 05, 2007 3:52 PM
Subject: Re: [drakelist] R4C problems
Garey Barrell <[EMAIL PROTECTED]> made an utterance to the drakelist
gang
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Hubert -
Most are around 1.6v p-p on the green wire. I have seen them as low as
1.4 and as high as 1.7. Late receivers changed C119 (Pi-net matching)
from 390 to 620 pF, which, in combination with a lower output PTO can
result in insufficient first mixer injection. In that case, change the
620 back to 390 pF.
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 4-B & C-Line Service Supplement CDs
<www.k4oah.com>
Hubert ROTH wrote:
"Hubert ROTH" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Garey
BTW Do you have the normal output voltage without load from the PTO?
Hubert
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