[Johnson] Parasitic oscillations in Ranger on 10M?

Fri, 28 Nov 2003 11:57:16 -0800 (PST)

Phil (and co):

No, I don't think this has anything to do with parasitics. Check that keying pot on the t.s. keying board and make sure you have that adjusted right. I have had similar problems with my Ranger before I discovered this "quick fix". 73 de Cal, N6KYR. 

Philip Atchley <[email protected]> wrote:
Hi.
This morning I thought I'd put my Ranger (original) and Hammarlund HQ-110 up
on 10 Meters and do some "AM". At first I thought I had a receiver problem
as the entire listening bench was "microphonic" in the receiver. I finally
discovered that it was coming from the Ranger, even when it was in Stby. It
was/is creating some very strong parasitic oscillations in the 10M band even
when in Stby. These were "tweakable" (but not eliminated) with the buffer
tuning control but not affected with the final tuning/loading.When in the
Phone position I can tune/load the rig normally.

What a disappointment I had hoped to work some 10M AM since the band is
open.

Any thoughts on what I should look for in the Ranger when I "open her up"?
It doesn't appear that the buffer and output stages have any form of
neutralization adjustments or anything.

73 from the "Beaconeers Lair".
Phil, KO6BB

In daily combat with QRM & QRN.
We may lose a battle but we'll win the war!
[email protected]
Merced, Central California
37.18N 120.29W CM97sh

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