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| Subject: | Re: LF: Dumb homebrewer - Advice needed |
| From: | Daniele Tincani <[email protected]> |
| Date: | Wed, 2 Feb 2011 07:03:33 -0800 (PST) |
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Many thanks to Petr and Marco for their replies.
I suppose the same considerations apply to stray capacitances? For example, connecting to the 30-350pF tuning capacitor by using a twisted pair of wires (10cm long) or running the same wires as separate as possible from each other has no relevance. Correct?
Best regards
Daniele
From: Marco IK1ODO -2 <[email protected]> To: [email protected] Sent: Wed, February 2, 2011 2:47:13 PM Subject: Re: LF: Dumb homebrewer - Advice needed At 13:51 02-02-11, you wrote: > Hello LF, > > I would like to improve a bit my home-made pre-selector for LF/MF. I would appreciate very basic advice on "mechanical" aspects like the following: the pre-selector has some molded inductors that can be selected by means of a rotary switch (band selector). Is it advisable to mount the inductors directly on the switch terminals or on a separate (small) PCB? Shorter is better in this case or not? > > Best regards > Daniele With Lambda=2200 m everthing shorter than L/10 (220 m) is "short" :-) Don't worry, 30 cm at 137 kHz is like a low inductance microwave bonding. Mechanical considerations prevail. 73 - Marco IK1ODO |
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