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Hmmm. 7.8 MHz times three is 23.4 MHz.

Really sounds as if there is no local-oscillator injection from L16 reaching the transmit mixer FET7.

Did you say "L30"? Or did you mean L39?

If the only signal reaching FET7 is coming out of L39, peaking it should have some effect. Just not the effect you want.

L7 should have some effect, but peaking it on receive tends to work best. L8 should NOT make a difference in transmit, only receive.

Can you hear even the tiniest trace of a signal on the channel frequency?

At all?

Either an input is missing from FET7 or the part itself is bad.

Maybe.

If you can't even "sniff" a 27 MHz signal with a receiver set to the same channel, the transmit mixer is MIA. Just can't say why. A coax jumper with the shell backed off the far end makes a good 'sniffing' antenna.

73

<blockquote data-quote="nomadradio" data-source="post: 763576" data-attributes="member: 22">Hmmm. 7.8 MHz times three is 23.4 MHz.Really sounds as if there is no local-oscillator injection from L16&nbsp; reaching the transmit mixer FET7.Did&nbsp; you say &quot;L30&quot;? Or did you mean L39?If the only signal reaching FET7 is coming out of L39, peaking it should have some effect. Just not the effect you want. L7 should have some effect, but peaking it on receive tends to work best. L8 should NOT make a difference in transmit, only receive.Can you hear even the tiniest trace of a signal on the channel frequency?At all?Either an input is missing from FET7 or the part itself is bad.Maybe.If you can&#039;t even &quot;sniff&quot; a 27 MHz signal with a receiver set to the same channel, the transmit mixer is MIA. Just can&#039;t say why. A coax jumper with the shell backed off the far end makes a good &#039;sniffing&#039; antenna.73</blockquote>

[QUOTE="nomadradio, post: 763576, member: 22"] Hmmm. 7.8 MHz times three is 23.4 MHz. Really sounds as if there is no local-oscillator injection from L16 reaching the transmit mixer FET7. Did you say "L30"? Or did you mean L39? If the only signal reaching FET7 is coming out of L39, peaking it should have some effect. Just not the effect you want. L7 should have some effect, but peaking it on receive tends to work best. L8 should NOT make a difference in transmit, only receive. Can you hear even the tiniest trace of a signal on the channel frequency? At all? Either an input is missing from FET7 or the part itself is bad. Maybe. If you can't even "sniff" a 27 MHz signal with a receiver set to the same channel, the transmit mixer is MIA. Just can't say why. A coax jumper with the shell backed off the far end makes a good 'sniffing' antenna. 73 [/QUOTE]

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