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Author Topic: Question About Hammarlund Piston-type Trimmers  (Read 509 times)
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Posts: 19

« on: April 04, 2024, 04:34:17 PM »

The radio in this subject is a Hammarlund HQ-110A. The attached photo is of the piston-type trimmer for the 2mc end of the 160 meter band. It is a 1-8pf trimmer. Note that the piston is all the way in as far as it can go. Does that mean it is a full capacitance (ie 8pf), or is it at the least capacity? There is one wire leading to its transformer. I assume since there is no other wire, that the chassis is the second contact. Hopefull ysomeone can clear up these 2 questions. Thank you.

* piston.jpg (560.51 KB, 1060x1052 - viewed 76 times.)
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« Reply #1 on: April 05, 2024, 08:02:38 AM »

That's full capacitance.
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