[Fox_Tango] FT-901/902 question

[Steve Sutfin]

Good thoughts Jerry, thanks. I remember now that I do have the kit to 
add 30 meters but never did. It required using the WWV bandswitch 
position and I like 15MHz receive for the tropics. This is an unmarked 
position below that but now I'm inspired. I'll just try a bunch of 
crystals and see what happens.....what fun :-).
73,
Steve k7dna

Dr. Gerald N. Johnson wrote:

>On Wed, 2009-01-07 at 23:16 -0800, Steve Sutfin wrote:
>  
>
>>Hello to the list,
>>  In the service manual for my FT-901DM I have wondered why the 'parts 
>>layout' for the VCO and XTAL units show 'additional' circuitry ( Q1213 
>>& T1209 etc. on the VCO unit and Q1311 & T1311 etc. on the XTAL unit) 
>>but nothing shows on the schematic. The respective boards are marked 
>>for those components but nothing is there.
>>   I also have a 'parts' radio and the same boards in that have all the 
>>components installed including the xtal socket.
>>  Anyone have a clue what this 'extra band' might be? I swapped the 
>>boards and put in a 10 meter crystal and got PLL lock on 34.xxx MHz or 
>>so with the bandswitch below the 15 MHz WWV position. I thought maybe 
>>it was for the CB band but I think that is a set of four that replace 
>>the 10 meter crystals.
>>  Anyway, it would be fun to find out what the circuit is /was for. 
>>Anybody...........????
>>73,
>>Steve k7dna
>>
>>    
>>
>There was a kit to add WARC bands to the 901DM. It wasn't known much.
>The first one enabled would have been 10 MHz, then 18 and 24 MHz later.
>With some parts in the radio, the kit may have mostly been crystals,
>I've never seen it or been inside a 901DM. I'm sure it wouldn't be
>difficult with the manual in hand to figure out the appropriate crystal
>frequencies for 10, 18, and 24 MHz bands or cheat by looking them up in
>a 902 manual.
>
>73, Jerry, K0CQ
>
>Don't it always seem to go that you don't know what you've got...till it's gone. 
>
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