Tube Radios • Re: The Type 38 AF power pentode as a regenerative detector
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The Type 89 AF power pentode also works well as a Hartley screen-gride
regenerative detector; even more AF output than the 38 or 41 in the same
circuit.
S...
17 minutes ago
That's a nicely done homebrew! I'm inspired to break out the parts box and soldering iron.
ReplyDeleteI have nearly all the parts, even the vernier drive. But not the FB enclosure.
Nice job.
ReplyDeleteIn their design Wes and Roger had 3seperate boxes:
VFO, transmitter and receiver.
The VFO had feedthrough caps on the DC voltage line.
This would greatly reduce the harmonics described by builder.
A seperate shielded VFO reduces
ReplyDeletemicrophonics . sorry poor English
See Part 3 on this web page:
ReplyDeletehttp://www.qrp.pops.net/hf-ragbag.asp
Bernt Diethard, Berlin