[1000mp] 70 MHz IF tap

[Harold Mandel]

Hi, Todd,

I tried the same method, only to be unhappy.

Matter-of-fact, I bought the very last NIB SM-7071 for over
a thousand bucks, hoping to match it up to the FT-1000MP-Mk-V.

I ran the 70MHz. to a gold connector on the apron and plugged
the scope up, only to find out through extensive questioning
that the 70MHz output is only 12KHz wide!

So now I'm stuck with a thousand dollar scope that can switch from
10.7 to 70 MHz I-F's.  I'm thinking of opening up my old Kenwood
TS-450AT rig and yanking the I-F on that. The best thing about that
project is both the Kenwood and the SM-7071 are 12 volt DC,
(the '7071 does 120 ac or 12 DC), so it could be great for a battery
type field day.

Hal
W4HBM 

-----Original Message-----
From: 1000mp-bounces at mailman.qth.net
[mailto:1000mp-bounces at mailman.qth.net] On Behalf Of Tod -ID
Sent: Monday, November 26, 2007 1:39 PM
To: 'All about Yaesu 1000mp'
Subject: [1000mp] 70 MHz IF tap

I am looking into tapping the 70 MHz IF signal prior to the entry into
the roofing filter. The objective is to get a signal which can then be
down converted to an IF frequency that can be received by one of the
single board Software Defined Radios. There is now available 'free'
software that will generate a "Bandscope" display on a computer screen
using the output of such single board radios. 

If someone has already done this I would be interested in their
experiences before I make my effort to do it. If anyone has ideas on how
to do it; warnings about potential problems (a) changing the
characteristics of the original FT1000X or (b) challenges in down
converting and/or selecting an IF frequency to use for the SDR or any
other advice I would appreciate their comment.

Tod, K0TO
 

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