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I just wanted to post a quick update about where I am at the moment. Guitar_199 hooked me up with some instructions on how to build an rf sniffer and how to use it with the VNA to check the oscillators. I was also able to max their output or align their output across all 23 channels. As it stands I'm getting the correct mixed frequencies from the first two oscillators all the way to the third oscillator (V11). I am not getting the 7.5mhz crystal mixing with the other two signals to give me a frequency in the 11 meter band though. The 7.5mhz crystal shows that it is at 7.255mhz when installed however when the crystal is removed it tests correctly at 7.5mhz. The original crystal, which was working prior to all output dieing and was on frequency per a frequency counter confirmationas well as an on air radio check, also presents the exact same way. So, what would prevent the 7.5mhz crystal from mixing with the first 2 frequencies and also why would the crystal show that it is low when installed? I also checked frequencies as if it were indeed off by 245khz but still nothing registered on the VNA. I also tried a second tube at V11 with the same results. Thanks!

<blockquote data-quote="Champo" data-source="post: 776556" data-attributes="member: 60887"><p>I just wanted to post a quick update about where I am at the moment.&nbsp; Guitar_199 hooked me up with some instructions on how to build an rf sniffer and how to use it with the VNA to check the oscillators. I was also able to max their output or align their output across all 23 channels. As it stands I&#039;m getting the correct mixed frequencies from the first two oscillators all the way to the third oscillator (V11).&nbsp; I am not getting the 7.5mhz crystal mixing with the other two signals to give me a frequency in the 11 meter band though.&nbsp; The 7.5mhz crystal shows that it is at 7.255mhz when installed however when the crystal is removed it tests correctly at 7.5mhz. The original crystal,&nbsp; which was working prior to all output dieing and was on frequency per a frequency counter confirmationas well as an on air radio check, also presents the exact same way.&nbsp; So, what would prevent the 7.5mhz crystal from mixing with the first 2 frequencies and also why would the crystal show that it is low when installed? I also checked frequencies as if it were indeed off by 245khz but still nothing registered on the VNA. I also tried a second tube at V11 with the same results.&nbsp; Thanks!</p></blockquote><p></p>

[QUOTE="Champo, post: 776556, member: 60887"] I just wanted to post a quick update about where I am at the moment. Guitar_199 hooked me up with some instructions on how to build an rf sniffer and how to use it with the VNA to check the oscillators. I was also able to max their output or align their output across all 23 channels. As it stands I'm getting the correct mixed frequencies from the first two oscillators all the way to the third oscillator (V11). I am not getting the 7.5mhz crystal mixing with the other two signals to give me a frequency in the 11 meter band though. The 7.5mhz crystal shows that it is at 7.255mhz when installed however when the crystal is removed it tests correctly at 7.5mhz. The original crystal, which was working prior to all output dieing and was on frequency per a frequency counter confirmationas well as an on air radio check, also presents the exact same way. So, what would prevent the 7.5mhz crystal from mixing with the first 2 frequencies and also why would the crystal show that it is low when installed? I also checked frequencies as if it were indeed off by 245khz but still nothing registered on the VNA. I also tried a second tube at V11 with the same results. Thanks! [/QUOTE]

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