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I found the microscopic part number and it is a PB1685 This board was in a FT301S. . any schematics for this one? relay control is provided by a quad 2 input nand gate which drives a npn transistor

I have a vox board PB1438B and another one that does not have a PB number on it. The B model has a sn72560 IC and mc14013 IC .. The one with no part number has mc14024 and mc14011 Where can I find a

It’s located on a small board behind the S meter. The Mic gain pot is facing up.

I was about to do the carrier point adjustments in the manual and looked for the mic gain adjustment and cant find it. can anyone tell me where it is?? Thanks.. Robert

Dear Chris Around two years ago, I start a restore of a FT-301d. The FT-301 manual have enough information that can help you. The display is really a problem. The best advice, if possible, is to

Good morning all you smart people! At a recent hamfest I bought a poorly 301 for a whole $10. The tag said "bad display" but when I powered it up the display was working, except for 2 segments of the

I have not noticed a problem with this…..I did a complete realignment according to the handbook and have not had a calibration problem since, so I can’t help. D. [email protected]> wrote:

The 301 I am working on needed this badly. The clarifier knob was a full mark to the left in order for the receive audio to be the same with the clarifier on/off. The instructions are

WWV (5 Mhz, LSB) receive was off frequency on the rig I am working on. Instructions are straight forward, no special equipment, just an antenna and able to receive WWV 5.0 Mhz (likely easier after

Hello there just joined the group . i have ?recently bought one of these 301s been using for receive which is great ! On tx there seems to be no output but the needle slams over like u never seen a

Looking through the 301 manual's alignment instructions for the s-meter, I immediately had a question about the signal generator levels all refering to "db". db is a relative measurement and levels

Forgot one attachment, shows display quality.

The Elcon site only has some English. I had to copy-past-translate a bit. The owner speaks perfect English in emails. I worked with him to build a universal VFO Stab to go with the 301 specific

Hi Michael, I've worked with many technical writers in my career and I have a lot of respect for them because it's extremely difficult to write technical guides not knowing the experience of the

Thanks Randy. I'm probably going to go trhough the entire alignment. I purchased the rig as the 3rd owner. When I talked with the previous owner, he had not done any work on the rig, but there are

Nice work sir, I didn't touch mine, Manual is so poor and they were close enough. I replaced display with the excellent ELCON product. I also added the ELCON frequency stablizer. Radio is playing

Hi Jim, Thanks for uploading these pictures. Could you send how you connected the equipment to be able to get those results? This might help others to do the same. The Yaesu manual is not good with

Jim <james_buttons@...> added the album LED color display - various color combinations ( /g/yaesuft301d/album?id=278162 ) : For use in poll called: "FT-301 RGB LED display

Jim <james_buttons@...> added the album 301 band pass filter alignment results ( /g/yaesuft301d/album?id=278160 ) : various pictures of results obtained for a 301 band pass