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collins 75s3b/c receiver 2nd mixer mod

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Author Topic: collins 75s3b/c receiver 2nd mixer mod  (Read 236 times)
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« on: June 03, 2019, 02:27:01 PM »

When a 6 kHz mechanical filter is installed the existing 455 kHz transformer (T5 I think) is unused.   a while back someone added it into the 2nd mixer plate circuit to drive the selected mechanical filter.  I have looked and cannot find the article (one found but site no longer avail).  Anyone have this info?


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to see ourselves as others see us.
It would from many blunders free us.         Robert Burns
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