I'm having some trouble with this radio. Extremely low modulation with the mic amp as it comes. Not sure what's wrong. To get enough power out I'm vastly over-driving it with an external mic amp. Richard, VK3LRJ, kindly humoured me and recorded a bit of how I'm received there. I've overlayed that bit of audio in this video recording from my shack.
Not great. An interesting little radio though. https://www.hfsignals.com/index.php/larcset/
2 comments:
Hi Peter,
Thanks for posting the video as my LARCSet arrived on Christmas and I have as yet to crack open the box. Thus, a good bit of information as likely I would see the same issue.
I did a modification of the EAQRP Club radio called the Perigrino (Pilgrim) which appeared as an article in SPRAT which I renamed the Paesano. It too had the low gain mic issue, and it was only cured with external mic preamp and electret microphone. But since the video shows a similar mic and external amp that likely is not the cure. Any possibility of the BFO frequency needing a tweak? Just thinking aloud as when I get round to it, I will see the same issue as you did. I do not plan on using the analog VFO but a two range LO at 4 and 18MHz so I can have LSB and USB for FT-8/
73's
Pete
Thank you Pete. I’ve replaced C9 (in series with the BFO crystal) with a 40pF trimmer so I can adjust the BFO. Lovely to get a comment from the master - 73!
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