Re: [Repeater-Builder] Syntor X conversion to 222 as a user radio?

2006-04-02 Thread Mike Morris
At 02:25 PM 04/02/06, you wrote:
I'm searching various yahoo groups looking to see if anybody has ever
modified a Syntor X up to the 222 MHz band...  I have a tracking
generator, so re-tuning the RF preselector set, and the VFO injection
filter set is feasable... I have not yet done the math, but I was
thinking of low-side injection with a 150-174 MHz Syntor X (which
normally uses high-side injection) ...

I did the math on a Motrac a long time ago, and actually moved a 172mhz
Motran (then had a serial tag made up that read U43.5MSN-3190AK)

Basically I converted the receiver LO multiplier 75-to-150MHz doubler
into a tripler, and ordered rocks for 149MHz receive channels from a
local cheap rock chipper. I wasn't going to spend good $ on a experimental
project.
The front end mod was similar to Kevin's Micor-receiver-to-220 mods.

The transmitter got the same doubler-to-tripler mod and the PA deck
was actually pretty easy...  each tuned circuit had a coil, fixed cap
and trimmer cap in parallel. By diking out the fixed cap it all tuned right
up.Not exactly the right L-C ratios, but it was a proof-of-concept idea.

A 149.150 CAP or MARS (I forget which) channel element with a
cheap crystal that had drifted low beyond use was able to be tweaked
to 149.0 and it landed me on 223.5
The finals were inefficient enough at 220 that they didn't need any
neutralization... I was seeing a clean 19-20 watts out.

I had the radio working on the local 223.94 and 224.94 repeaters,
and on 223.5MHz simplex.  It lasted about a year before it got
replaced with a Midland 13-509... 12 channels in a smaller box.
Then a 13-513.  Then a trunk mounted 13-513 with 11 memory
channels (DIP switches back in the radio) and one VFO channel
via a homebrew control head.

Mike WA6ILQ





 
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Re: [Repeater-Builder] Syntor X conversion to 222 as a user radio?

2006-04-02 Thread Tom Manning
Mike
I have a modified Syntorx for two meters.  You may want to take a look 
at Piex.com.  They are the people I got my mod kit from and it worked well. 
I think they could have made provisions for a control head and it would have 
been much nicer.  They also advertise it will go to 220.0Mhz and I agree. 
The mod kit is very nice and well thought out.  If I can answer particular 
questions don't hesitate to ask.
73's de Tom MAnning, AF4UG
- Original Message - 
From: Mike Morris [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, April 02, 2006 6:20 PM
Subject: Re: [Repeater-Builder] Syntor X conversion to 222 as a user radio?


 At 02:25 PM 04/02/06, you wrote:
I'm searching various yahoo groups looking to see if anybody has ever
modified a Syntor X up to the 222 MHz band...  I have a tracking
generator, so re-tuning the RF preselector set, and the VFO injection
filter set is feasable... I have not yet done the math, but I was
thinking of low-side injection with a 150-174 MHz Syntor X (which
normally uses high-side injection) ...

 I did the math on a Motrac a long time ago, and actually moved a 172mhz
 Motran (then had a serial tag made up that read U43.5MSN-3190AK)

 Basically I converted the receiver LO multiplier 75-to-150MHz doubler
 into a tripler, and ordered rocks for 149MHz receive channels from a
 local cheap rock chipper. I wasn't going to spend good $ on a experimental
 project.
 The front end mod was similar to Kevin's Micor-receiver-to-220 mods.

 The transmitter got the same doubler-to-tripler mod and the PA deck
 was actually pretty easy...  each tuned circuit had a coil, fixed cap
 and trimmer cap in parallel. By diking out the fixed cap it all tuned 
 right
 up.Not exactly the right L-C ratios, but it was a proof-of-concept idea.

 A 149.150 CAP or MARS (I forget which) channel element with a
 cheap crystal that had drifted low beyond use was able to be tweaked
 to 149.0 and it landed me on 223.5
 The finals were inefficient enough at 220 that they didn't need any
 neutralization... I was seeing a clean 19-20 watts out.

 I had the radio working on the local 223.94 and 224.94 repeaters,
 and on 223.5MHz simplex.  It lasted about a year before it got
 replaced with a Midland 13-509... 12 channels in a smaller box.
 Then a 13-513.  Then a trunk mounted 13-513 with 11 memory
 channels (DIP switches back in the radio) and one VFO channel
 via a homebrew control head.

 Mike WA6ILQ






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Re: [Repeater-Builder] Syntor X conversion to 222 as a user radio?

2006-04-02 Thread w8ak






I've converted Maxtracs to 222 mhz. You may want to read my mod at http://members.aol.com/w8ak 

Glenn













  




  
  
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Re: [Repeater-Builder] Syntor X conversion to 222 as a user radio?

2006-04-02 Thread Lee Williams






Glenn,your small font is killin ushave mercy on us with lo-res
monitors and failing eyesight!

[EMAIL PROTECTED] wrote:

  
  
  
  
  
  I've converted Maxtracs to 222 mhz. You may want to read my mod
at http://members.aol.com/w8ak
  
  
  Glenn
  















  




  
  
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RE: [Repeater-Builder] Syntor X conversion to 222 as a user radio?

2006-04-02 Thread N9WYS
Title: RE: [Repeater-Builder] Syntor X conversion to 222 as a user radio?








His font looks OK here. Could it be your browser/client is making the change in the background??

Mark - N9WYS



From: Repeater-Builder@yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com] On Behalf Of Lee Williams

Sent: Sunday, April 02, 2006 10:50 PM

To: Repeater-Builder@yahoogroups.com

Subject: Re: [Repeater-Builder] Syntor X conversion to 222 as a user radio?

Glenn,your small font is killin ushave mercy on us with lo-res monitors and failing eyesight!

[EMAIL PROTECTED] wrote: 



I've converted Maxtracs to 222 mhz. You may want to read my mod at http://members.aol.com/w8ak 



Glenn









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 To unsubscribe from this group, send an email to:

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