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Re: CW output on FT301

 

Carlos (and others)

I’ve got an FT-301 (analog dial) - the first new rig I owned as a ham (1978) - and it’s been sick since I sent it for service in 2009 to a guy who’s now SK. A few months back, I turned it on for the first time in probably 10 years. Receive seems good, but - as before - the transmit relay just chatters.

I’m not without gear - I have my SK OM’s TS940S, a KX3, and the FT-707 I had on my now-departed sailboat for 38 years.

But I’d sure like to get the FT-301 working. I suspected a voltage issue but can’t find any trouble-shooting indications of what might be the issue. Your answer on this thread suggests you’re a FT-301 pro - do you have any ideas?

Mel - W3PYF?

On Mon, Oct 25, 2021 at 10:38 PM Carlos <py1egg@...> wrote:
Hi Dave,

The FT301 uses a separate 8999.3kHz crystal?for transmission, you?ll find it as X401 in the IF Unit (PB1436B):

Schematic: Page 16, figure 15 /?Description: Page 19
CW adjustment: THIS PROCEDURE IS MISSING!
TC401?CW frequency /?TC402?CW level

However, the alignment? procedure for CW TX adjustment (frequency and level) is similar to the AM mode, considering the due differences (power levels, no modulation, etc...):

AM Unit (PB1556), X2001 8999.3kHz
Schematic: Page 17, figure 17 /?Description: Page 19
AM adjustment: Page 34-35 ("MAINTENANCE & ALIGNMENT")
TC2001 (Item 1)? AM frequency /?VR2001 (Item 3)? AM level
?
I keep my FT-301D working perfectly as new, mine has the three original IF filters and the superb display replacement designed by?WA7ZVY, thanks Paul!
?
73 de PY1EGG - Carlos

--
Mel Snyder
melsnyder@...
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