开云体育

Hello,

I have begun an attempt to make one good one out of two parts rigs. So far so good. The big problem so far is a bad SSB filter, waiting on delivery of a parts rig with 2 filter boards. Hopefully one filter will play. This is a very interesting little transceiver.?

Cheers all,

Randy

Randy sounds like you are getting a great handle on putting another FT-301D on the air.? Congratulations.

I had to learn a lot about the IF Board on the road to final diagnosing my SSB low power out problem.
IF Board Q403 description lies. It does not amplify the DSB signal coming from the AF Board.
The gain of the weird JFET circuit Q403 is about .3 unity gain.
The circuit is a buffer/impedance matching circuit.
Also, the IF Board schematic has 2 major errors.

Is there an Yeasu internal doc that shows ANY levels on board pins?
Yeasu seem to be devoid of any levels in their docs.