[Repeater-Builder] Re: Chassis Question

2010-06-02 Thread burkleoj 
John,
If you run across any 406 - 420 MHz Micors or Mitreks I could use one or two of 
each.

Thanks,
Joe

--- In Repeater-Builder@yahoogroups.com, La Rue Communications 
laruec...@... wrote:

 Mike -
 
 Thanks for that snippet. Thats the reference I was referring to when I 
 determined it was non frequency dependent. With the absence of further 
 responses from the group, I will consider my answer confirmed. Thank you all 
 for your time! 
 
 *This unit came out of service from a UHF repeater. There are no channel 
 elements but I guess it can be used for VHF stations as well with a simple 
 board change, right?*
 
 John Hymes
 La Rue Communications
 10 S. Aurora Street
 Stockton, CA 95202
 http://tinyurl.com/2dtngmn
   - Original Message - 
   From: Mike Morris 
   To: Repeater-Builder@yahoogroups.com 
   Sent: Tuesday, June 01, 2010 2:45 PM
   Subject: Re: [Repeater-Builder] Chassis Question
 
 
 
   At 11:01 AM 06/01/10, you wrote:
 
 
 
 Gentlemen - (And Ladies)
  
 I have a Micor Unified Chassis here model TCN1187A. Am I right in 
 confirming that this Chassis is not frequency dependent? There are no channel 
 elements in this unit so I cannot confirm what frequency is would work for. 
 Can anyone shed some detailed light on this unit for me please?
  
 Thanks!
  
 John Hymes
 La Rue Communications
 10 S. Aurora Street
 Stockton, CA 95202
 http://tinyurl.com/2dtngmn
 
 
   Most any frequency dependent part in a Micor  
   (actually most any Moto radio) is marked with 
   a part number in the format of three letters 
   and 4-digits, possibly followed with a revision 
   code...  Like TLD8272B1...  
 
   The secret is the third letter.   The text below is cut 
   and pasted from 
http://www.repeater-builder.com/motorola/aaa-numbering-scheme.html 
 
   Mike WA6ILQ
 
   A Under 25 MHz
   B 25-54 MHz (yes, the table in the buyer's guide included 10 meters and 6 
 meters)
   C 72-76 MHz   (see note 1)
   D 144-174 MHz   (see note 2)
   E 406-470 MHz   (see note 3)
   F 890-960 MHz
   N Not frequency dependent (like an audio-squelch board, or a power supply)  
  (see note 4)
 
   NOTES:
   [1]: C was limited to the 72-76 MHz USA assignment (one split) until 
 Motorola started making land mobile equipment for the European 66-88 MHz band 
 (which usually required two splits). Some books say that the so-called mid 
 band is 60-99 MHz. There is no 30-50 MHz low band in Europe, when they refer 
 to low band they are referring to 66-88 MHz. 
 
   In the USA, 60-66 MHz is television channel 3, 66-72 MHz is TV channel 4, 
 the 72-76 MHz frequencies are used as Operational Fixed / Repeater 
 frequencies (essentially commercial point-to-point links), 76-82 MHz is TV 
 channel 5, 82-88 MHz is TV channel 6, and 88-108 MHz is commercial FM 
 broadcast. One rumor is that as part of the HDTV conversion in the USA the 
 FCC and the military want to eliminate TV channels 4, 5 and 6 then reassign 
 the 66-88 MHz range as a military band that aligns with the rest of the world 
 (i.e. for joint operations and exercises). 
 
   [2]: D was redefined downwards to 136 MHz at some point.   There are high 
 band equipment models specified as 136-174 MHz, and others that are 150-174 
 MHz. 
 
   [3]: E was redefined downwards to 390 MHz in the early 70s and then to 360 
 MHz in the early 80s for certain military, government and spook equipment. It 
 was expanded upwards to 490 MHz and later to 512 MHz as the 470-494 MHz then 
 494-512 MHz frequencies were allocated. A 1990s salesmans order book has the 
 UHF band listed as going from 400 MHz to 520 MHz. There has also been some 
 interesting equipment found on frequencies as high as 550 MHz. 
 
   [4]: N is still used as a Not frequency dependent identifier even when 
 there is some difference between wideband and narrowband equipment (like in 
 the audio recovery circuitry in an IF / discriminator board). Most of the 
 time a variation like that is handled in the final letter suffix (i.e. a 
 TLNA1 might be wideband and a TLNA2 might be narrowband), but there 
 are exceptions. 
 
   The four numbers after the three letters are simply a design sequence 
 number. One or two letters after the numbers are a version, variation or 
 revision identifier (the term used depends on which book you read). Almost 
 all assemblies have one letter after the sequence number (i.e. the first 
 shippable design is dubbed version A), some have two characters, a few have 
 three (i.e. TLNA1A).

Re: [Repeater-Builder] Re: Chassis Question

2010-06-02 Thread La Rue Communications 
Will keep my eyes open for them Joe. We have a few more in surplus.

John Hymes
La Rue Communications
10 S. Aurora Street
Stockton, CA 95202
http://tinyurl.com/2dtngmn
  - Original Message - 
  From: burkleoj 
  To: Repeater-Builder@yahoogroups.com 
  Sent: Wednesday, June 02, 2010 12:05 AM
  Subject: [Repeater-Builder] Re: Chassis Question



  John,
  If you run across any 406 - 420 MHz Micors or Mitreks I could use one or two 
of each.

  Thanks,
  Joe

  --- In Repeater-Builder@yahoogroups.com, La Rue Communications 
laruec...@... wrote:
  
   Mike -
   
   Thanks for that snippet. Thats the reference I was referring to when I 
determined it was non frequency dependent. With the absence of further 
responses from the group, I will consider my answer confirmed. Thank you all 
for your time! 
   
   *This unit came out of service from a UHF repeater. There are no channel 
elements but I guess it can be used for VHF stations as well with a simple 
board change, right?*
   
   John Hymes
   La Rue Communications
   10 S. Aurora Street
   Stockton, CA 95202
   http://tinyurl.com/2dtngmn
   - Original Message - 
   From: Mike Morris 
   To: Repeater-Builder@yahoogroups.com 
   Sent: Tuesday, June 01, 2010 2:45 PM
   Subject: Re: [Repeater-Builder] Chassis Question
   
   
   
   At 11:01 AM 06/01/10, you wrote:
   
   
   
   Gentlemen - (And Ladies)
   
   I have a Micor Unified Chassis here model TCN1187A. Am I right in 
confirming that this Chassis is not frequency dependent? There are no channel 
elements in this unit so I cannot confirm what frequency is would work for. Can 
anyone shed some detailed light on this unit for me please?
   
   Thanks!
   
   John Hymes
   La Rue Communications
   10 S. Aurora Street
   Stockton, CA 95202
   http://tinyurl.com/2dtngmn
   
   
   Most any frequency dependent part in a Micor 
   (actually most any Moto radio) is marked with 
   a part number in the format of three letters 
   and 4-digits, possibly followed with a revision 
   code... Like TLD8272B1... 
   
   The secret is the third letter. The text below is cut 
   and pasted from 
http://www.repeater-builder.com/motorola/aaa-numbering-scheme.html 
   
   Mike WA6ILQ
   
   A Under 25 MHz
   B 25-54 MHz (yes, the table in the buyer's guide included 10 meters and 6 
meters)
   C 72-76 MHz (see note 1)
   D 144-174 MHz (see note 2)
   E 406-470 MHz (see note 3)
   F 890-960 MHz
   N Not frequency dependent (like an audio-squelch board, or a power supply) 
(see note 4)
   
   NOTES:
   [1]: C was limited to the 72-76 MHz USA assignment (one split) until 
Motorola started making land mobile equipment for the European 66-88 MHz band 
(which usually required two splits). Some books say that the so-called mid 
band is 60-99 MHz. There is no 30-50 MHz low band in Europe, when they refer 
to low band they are referring to 66-88 MHz. 
   
   In the USA, 60-66 MHz is television channel 3, 66-72 MHz is TV channel 4, 
the 72-76 MHz frequencies are used as Operational Fixed / Repeater 
frequencies (essentially commercial point-to-point links), 76-82 MHz is TV 
channel 5, 82-88 MHz is TV channel 6, and 88-108 MHz is commercial FM 
broadcast. One rumor is that as part of the HDTV conversion in the USA the FCC 
and the military want to eliminate TV channels 4, 5 and 6 then reassign the 
66-88 MHz range as a military band that aligns with the rest of the world (i.e. 
for joint operations and exercises). 
   
   [2]: D was redefined downwards to 136 MHz at some point. There are high 
band equipment models specified as 136-174 MHz, and others that are 150-174 
MHz. 
   
   [3]: E was redefined downwards to 390 MHz in the early 70s and then to 360 
MHz in the early 80s for certain military, government and spook equipment. It 
was expanded upwards to 490 MHz and later to 512 MHz as the 470-494 MHz then 
494-512 MHz frequencies were allocated. A 1990s salesmans order book has the 
UHF band listed as going from 400 MHz to 520 MHz. There has also been some 
interesting equipment found on frequencies as high as 550 MHz. 
   
   [4]: N is still used as a Not frequency dependent identifier even when 
there is some difference between wideband and narrowband equipment (like in the 
audio recovery circuitry in an IF / discriminator board). Most of the time a 
variation like that is handled in the final letter suffix (i.e. a TLNA1 
might be wideband and a TLNA2 might be narrowband), but there are 
exceptions. 
   
   The four numbers after the three letters are simply a design sequence 
number. One or two letters after the numbers are a version, variation or 
revision identifier (the term used depends on which book you read). Almost all 
assemblies have one letter after the sequence number (i.e. the first shippable 
design is dubbed version A), some have two characters, a few have three (i.e. 
TLNA1A).