Good Morning Friends
Thanks for respond to my question about mic level.
I have other question , some try change the cristal filters of TR4 for
More Width (example 2.8 or 3 Khz) what is the result is possibly work
with these filters?.
Its possibly maybe switch T/R for transmit with 2.8 and
- Original Message -
From: mail.speedy.com.ar lw3...@speedy.com.ar
To: drakelist@zerobeat.net
Sent: Thursday, June 30, 2011 6:49 AM
Subject: [Drakelist] TR4 Filters
Good Morning Friends
Thanks for respond to my question about mic level.
I have other question , some try change the
Replacing filters and using different set of filters for T/R. They are all
possible if you have right parts and do some electrical/mechanical mod. But
why would you do that? The filters in TR-4 are not very narrow/sharp anyways.
If you want to change the TX audio, try doing something on mic
Fellow enthusiasts,
Thanks for all the nice emails. Wish I had a hundred kits available for all
the Drake enthusiasts.
Have a safe, enjoyable, holiday weekend. Please remember the price that has
been paid for our freedom.
73,
Evan, K9SQG
I spent a part of the afternoon isolating the PTO audio fuzziness I
described when the VFO dial is moved from 0 then upwards to 500 when
listening to a CW carrier. I hear a pure, clean CW carrier at the 0 VFO
position but then progressively gets worse, ending at 500. Based on how
the
On Thu, 30 Jun 2011 21:09:05 -0400, Paul Christensen wrote:
As the dial changes from 0 to 500, the PTO's ferrite core moves toward the
back of the receiver. As the core moves rearward, it is also coming nearer
to the AC power transformer. PTO cores are especially susceptible to
magnetic
Paul -
Interesting.
Something to try. A piece of copper wire, as big
as will fit, looped around the outside of the
transformer in the same plane as the transformer
winding. Short the ends together, forming a
complete 'shorted turn' around the transformer.
I suspect a sheet of mu-metal
7 matches
Mail list logo
