Re: OHR-100A 30M Birdie

[ Follow Ups | Post Followup | Return to QRP Forum ]


Posted by:  Cal K4JSI

Posted On:  03/30/04

Subject:  Re: OHR-100A 30M Birdie

Message Posted:
    In Reply to: OHR-100A 30M Birdie posted by Karl J. Zuk - N2KZ on 03/28/04

Karl and all,
I fired up my 30M OHR-100A and found a birdie at about 10.115 MHz. Luckily, mine is quite weak. I'd guess that the birdie is a result of a harmonic of the VFO beating against a harmonic of the BFO crystal, this assuming that the OHR-100A is a single conversion design. Not sure what the cure may be, but mitigation could entail grounding the crystal case, ensuring that lead lengths are as short as possible or fiddling a bit with component positions. It'll probably be impossible to eliminate, but maybe it can be reduced significantly in amplitude.
72/73
Cal K4JSI

Follow Ups:


Post a Followup

Name/Call:
E-Mail:
Subject:
Message to Post:
Use Fixed Width Font (Useful for lining up columns of data in log sheets)
Link URL:
(This can be a link to a web page or anything else.)
Link Name:
(This is an optional description or title for the URL above.)
Picture:
(This must be the full address of a .JPG or .GIF)
Check this box to receive an e-mail when someone replies to your message


 

[ Posting Rules | Follow Ups | Return to QRP Forum ]