[ICOM] IC-215 alignment inst. ???

[D C *Mac* Macdonald]

Okay, all.

I got out my IC-215 Instruction Manual and
formula for figuring receive crystals is:

Fx = Crystal Freq          Fo = Operating Freq


Fx = Fo - 10.7
       ----------
           9

Transmit uses a multiplication of 8.

I have a parts layout of the main p.c. board
AND  the receiver p.c. board.  I can make
copies if anybody needs them.


73 - Mac, K2GKK/5



----Original Message Follows----
From: "Dave Edwards" <kd2e at comcast.net>
Reply-To: ICOM Reflector <icom at mailman.qth.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Subject: Re: [ICOM] IC-215 alignment inst. ???
Date: Tue, 24 Oct 2006 14:40:10 -0400

Mac...just got crystals in the mail today from JAN.
I got one repeater pair...but need to install PL, and 146.52 simplex. It 
seems to work fine, but I notice the output meter is down a bit on both 146 
range crystals than it is from the other 145 range crystals. How much down I 
don't yet know. . My IC-215 'E' manual shows a different crystal frequency 
for local oscillator than the US model. One of them you have to add it to 
the receive freq to get 10.7 , and the US crystal you have to subtract it. I 
can find out the details again by reading the theory....but it had to do 
with addition vs subtraction to get the 10.7....strange!!
...Dave
----- Original Message ----- From: "D C *Mac* Macdonald" <k2gkk at hotmail.com>
To: <icom at mailman.qth.net>
Sent: Tuesday, October 24, 2006 2:31 PM
Subject: Re: [ICOM] IC-215 alignment inst. ???


>Hi, Dave.
>
>I was not aware that there were overseas
>and US/Canada versions.  Do you have  ANY
>US frequency crystal pairs to attemp to use?
>
>I could  LOAN  you a pair on 145.550 simplex
>for you to test out.
>
>I'm not currently using my 215 as its power
>output is down for some reason and I have
>both W-32A and an Alinco HT that I can use
>if I need to.
>
>I would be greatly surprised if the coils for the
>RX local oscillator would cover both high  AND
>low side injection.
>
>Mac - K2GKK/5
>
>
>
>----Original Message Follows----
>From: "Dave Edwards" <kd2e at comcast.net>
>Reply-To: ICOM Reflector <icom at mailman.qth.net>
>To: "ICOM Reflector" <icom at mailman.qth.net>
>Subject: Re: [ICOM] IC-215 alignment inst. ???
>Date: Tue, 24 Oct 2006 14:00:49 -0400
>
>Mac....the xtals in there are for british repeater freqs in the 145 Mhz 
>range. Would your first reaction be that should be close enough for the 146 
>range to work fine?  One strange thing I found between the export and US 
>IC215...the mixing scheme is different...you have to add the local osc freq 
>to desired sig to get 10.7 IF...instead of subtracting in US model......or 
>vice versa...one is added, the other is subtracted.
>
>Can't think why that would be...unless some mixing product falls on a 'bad' 
>frequency??
>
>...Dave
>
>
>
>----- Original Message ----- From: "D C *Mac* Macdonald" 
><k2gkk at hotmail.com>
>To: <icom at mailman.qth.net>
>Sent: Tuesday, October 24, 2006 1:43 PM
>Subject: Re: [ICOM] IC-215 alignment inst. ???
>
>>Hi, Dave.
>>
>>Your biggest problem will probably be determining
>>which components are which from the block and
>>schematic diagrams.
>>
>>If the cans are "full of wax" use your wife's hair
>>dryer to soften the wax prior to attempting to
>>adjust them.  The IF stage should not need any
>>adjustment.
>>
>>Back in 1972, I had the crystal controlled IC-20
>>and IC-21 rigs for 2m.  I built a GLB synthesizer
>>that would cover 140-149.995 MHz.  I retuned
>>both radios to be able to cover entire 144-148
>>band plus a bit below to be able to cover Air
>>Force M.A.R.S. frequencies.  I got about 3 Watts
>>at 143.950 and still had about 7 or 8 Watts out
>>in the majority of the 2m ham band if I remember
>>correctly.
>>
>>I still have a 215 I bought new at Dayton back
>>in 1974 or 1975.
>>
>>YRMV.
>>
>>Mac - K2GKK/5
>
>
>----
>Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
>Icom Users Net: Sundays, 1700Z, 14.316 MHz
>Icom FAQ: http://www.qsl.net/icom/

----
Your Moderator: Dick Flanagan K7VC, icom-owner at mailman.qth.net
Icom Users Net: Sundays, 1700Z, 14.316 MHz
Icom FAQ: http://www.qsl.net/icom/