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Title: Muting a BC348N Post by: ve6pg on September 03, 2012, 07:30:28 PM how does the mute, or standby in the bc348 work?...i'd like to wire it in to my t/r circuit...
..thanks.. ..tim.. ..sk.. Title: Re: Muting a BC348N Post by: WB6NVH on September 03, 2012, 09:01:16 PM I don't have the schematic in front of me but the muting method is to open the screen B+ feed at the power connector. Conversions may have screwed this up so you may have to trace it out. Then also use a T/R switch at the antenna input unless you are using separate antennas.
Title: Re: Muting a BC348N Post by: K9PNP on September 03, 2012, 09:54:07 PM Mine didn't have the original power connector, but looking at the schematic: AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
Pins 2 and 6 of the power connector are shorted, normally with a relay. This applies SG voltage to 2nd RF amp and 1st and 2nd IF amps. Mine is a 348Q. the J, N, and Q are about the same; covered in the same manual. I have the manual in .pdf if you need it. 7.48 MB. |