[Yaesu] How do I add WARC bands to old FT-901DM?

[Zoltan.Pitman@libertel.nl]

Ed,

You can add any two of the three WARC bands with the INRAD kits using the
unused postions of the bandswitch. I also replaced the mixer-panel with a
low-noise DBM mixer (I think it was also from Inrad) and had a great radio
for many years. 

I used the FT901-DM with the Microwave 144 MHz transverter. It requires a
simple mod to create a high impedance low power output. (I can dig up the
docs somewhere). 

For mods you can see the great mod site at: http://www.mods.dk/index.htm

Yes, the keyer is iambic (no dot memory).

I think I answered everything. I liked its sound, good keyer and its sharp
preselector. It became a victim of one of the summer thunderstorms. :(

73 de Zoli HA1AG


> -----Original Message-----
> From: Ed Pugh (VA3PU) [mailto:va3pu@rac.ca]
> Sent: 08 October, 2001 13:53
> To: yaesu@contesting.com
> Subject: [Yaesu] How do I add WARC bands to old FT-901DM?
> 
> 
> 
> Hi.
> 
> A few weeks ago, I purchased a used FT-901 DM at a local hamfest.
> 
> This is the "older" version that does NOT have the WARC bands
> (12, 17 and 30 M).  (Note that Yaesu later came out with a version
> of the FT-901 that DID include WARC bands.  BTW, does anyone know
> the difference(s) between this later FT-901DM (with WARC) and the
> FT-902 DM ???  Pictures of their front panes look identical,
> except for the model name plate.)
> 
> [I don't have this rig on the air just yet - I am waiting to get
> some HF radiators up.]
> 
> Is there an available mod to add WARC bands to the older FT-901DM,
> in addition to the existing bands?
> 
> Is there, perhaps, a published construction project to make a
> transverter to add these bands?
> 
> If there are any web sites that that describe how to add WARC
> bands to the older FT-901DM, I would appreciate knowing the URLs.
> 
> Oh, and one more question.  Is the Curtiss keyer in the FT-901DM
> iambic or not?  (This uses the oldest version of the Curtiss 8044
> chip, with no suffix.  I do know that the 8044ABM - i.e. with
> suffix "ABM" - is iambic, but I am wondering about the 8044 without
> any suffix.  I am wondering if I should get iambic paddles for this.)
> Is there any way to use the FT-901DM's internal keyer in a "code
> practice" mode; i.e. without actually transmitting CW?
> 
> TNX ES VY 73,
> 
> Ed Pugh (VA3PU)
> Ottawa, Ontario
> va3pu@rac.ca
> 
> Ed Pugh   | A common mistake that people make when trying
> VA3PU     | to design something completely foolproof is to
> Ottawa ON | underestimate the ingenuity of complete fools.
> CANADA    | - Douglas Noel Adams (1952 - May 11, 2001 :-( )
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