Lou,
Well, it depends. There are at least three ways the L7 bandswich was locked
out from 10 meters; I assume you found the way to undo yours.
For the L7s I've serviced, I found two different results with no consistent
explanation for the differences. In one case, you do the mod by adding the two
68 pf caps, etc. and then retune the input coil per the instructions. In the
other case, adding the 68 pf caps is not necessary, and the input coil doesn't
always need to be adjusted. Both procedures seem to work, depending...
73,
Evan, K9SQG
-Original Message-
From: Gudguyham gudguy...@aol.com
To: drakelist drakelist@zerobeat.net
Sent: Sun, Jul 1, 2012 12:01 am
Subject: [Drakelist] 10 meters for the Drake L7
Hello everyone, new to the list. I'd like to know if anyone has or knows
where to get an authorized bulletin from Drake outlining the procedure for
enabling 10 meters on the L7 amplifier. I've seen a blurb about it on the
Internet but nothing that seems to be Drake authorized. Although I have done
the modification as shown in the blurb I am not liking the input swr results I
am getting on 15 and 10 meters now. On 160-20m my amp has a dead flat input
swr, but not on 15 and 10. I have questions. If no bulletins had been issued
and anyone has done this mod with greater success than I, please let me know.
Thanks, 73 Lou W1QJ
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