[ICOM] ICOM H6 programming help

[D C Macdonald]

I have no idea as to the synthesizing and programming
scheme used by this radio.  HOWEVER, it seems clear to me
that the I.F. is likely to be running at 16.9 MHz with the
reference crystals being shown.  It also appears that the
crystals X202 and X203 should be separated by 4.225 MHz.
It also appears that the frequencies of the crystals you have
in  YOUR  radio are the result of somebody's attempt to
modify coverage in some manner.

Since you have both user and service manuals, could you
scan the block diagram (assuming you have one) and send
it to me for analysis?

73  ---  Mac, K2GKK/5



----Original Message Follows----
From: Reed Park <reedpark at nbnet.nb.ca>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: ICOM Reflector <icom at mailman.qth.net>
Subject: Re: [ICOM] ICOM  H6 programming help
Date: Tue, 08 Feb 2005 14:50:37 -0400

Gary Fiber wrote:

>Reed

Hi Gary

>The service manual used to have programming information with in it.

I have the service manual for it. It doesn't really tell you where to put 
the diodes
for any particular frequency.

There is a chart showing operating frequency range using one of 4 crystals. 
You are right.
It will not work into te 2 meter band. So I was hoping I could program with 
2 channels
on the Red Cross frequencies that are in use in this area. One simplex and 
one repeater
frequency. I look after some of their Motorola radios for them as a 
volunteer. No charge
to them. I am a retired radio tech, and it gives me something to do.

Looking at the xtals that are in the radio and looking at the chart, makes 
me wonder what the
heck the radio was used for before, as neither the X202 Receive or the X203 
Transmit xtals
are the 4 listed in the manual for the frequency range of 150.005 thru 
170.000 MHz.

>I can say it will not go into the 2 meter band without a crystal change. I 
>have programmed dozens of the H-6's but don't have the information anymore. 
>Icom America had that information at one time as i used it while I worked 
>there. If I knew what the crystal frequencies were I might be able to jog 
>my memory.

Original xtal frequencies were as follows.

operatig frequency range     X202               X203

150.005 ~  155.000          32.02626          36.25125

155.005  ~  160.000          33.27625          37.50125

160.005  ~  165.000           34.52625          38.75125

165.005  ~  170.000           35.77625          40.00125

In it are 33.070 for X202,  and  37.305  for X203. Rather strange

>Gary K8IZ
>
7 3
Reed