like a banana.
All my computers have my signature with various pearls of wisdom appended
thereto.
From: Bill & Becky
Sent: Wednesday, July 11, 2012 7:20 PM
To: drakelist@zerobeat.net
Subject: [Drakelist] R4C BFO Leakage
A few weeks back I wrote about PBT levels in SSB/AM modes. It w
list@zerobeat.net
Subject: [Drakelist] R4C BFO Leakage
A few weeks back I wrote about PBT levels in SSB/AM modes. It would change
S-Meter levels depending on adjustment of the PBT. I ruled out the 4NB
board by removing it..no change.
However when I removed the bottom cover almost 6 S-Units o
[mailto:drakelist-boun...@zerobeat.net]
On Behalf Of Bill & Becky
Sent: Thursday, 12 July 2012 9:21 AM
To: drakelist@zerobeat.net
Subject: [Drakelist] R4C BFO Leakage
A few weeks back I wrote about PBT levels in SSB/AM modes. It would change
S-Meter levels depending on adjustment of the PBT. I r
A few weeks back I wrote about PBT levels in SSB/AM modes. It would change
S-Meter levels depending on adjustment of the PBT. I ruled out the 4NB board
by removing it..no change.
However when I removed the bottom cover almost 6 S-Units of PB feedthrough were
reduced and performance was en
I turned on the R4C to discover that audio was only being output in the AM
mode. The trouble turned out to be the BFO device, Q5, an NPN device 2N3394.
I replaced it with a 2NA and we're back in business. I have not seen this
failure posted on the Drakelist so thought I'd drop it in here.
"R March" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
--
I have an R4C that has substantial BFO feedthrough problems. As one tunes
the pass band tuning through center frequency, the s- meter goes up to about
s-9.
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