| Author |
Message |
    
Coyote
Member
Username: Coyote
Post Number: 51
Registered: 11-2004
| | Posted on Monday, December 27, 2004 - 3:02 pm: | 
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Is there a receive adjustment for side band on the TRC-457? Receive is garbled on side band, seems to transmit ok though. |
Swamper105
New member
Username: Swamper105
Post Number: 5
Registered: 12-2004
| | Posted on Tuesday, March 22, 2005 - 9:50 pm: |
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I be darned if i could remember what the number is but theres a little blue coil toward the front of the board just take it out it should clear it up . it looks like a blue dot , With the radio open and the front toward you its on the left side near the front it there all alone near the transister.. |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 301
Registered: 9-2004
| | Posted on Tuesday, March 22, 2005 - 10:35 pm: |
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coyote, do you have the clarifier unlocked on that radio?
matt |
Yankee
Intermediate Member
Username: Yankee
Post Number: 424
Registered: 7-2003
| | Posted on Wednesday, March 23, 2005 - 1:31 am: |
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This radio has 3 crystals in the PLL control section and each one of the crystals has an adjustable trimmer. the 3 crystals and the trimmers are in a little metal enclosure with an open top by them selves. Each mode AM,USB and LSB has it's own crystal and trimmer. I have five of these very good sideband rigs from the late 70s early 80s, and yes one of them is the TRC-457, four of them I rate at a 10, the 5th one is a parts radio.
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Viking
Intermediate Member
Username: Viking
Post Number: 189
Registered: 2-2002
| | Posted on Wednesday, March 23, 2005 - 2:26 pm: |
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The trimmers are as follows:
AM - CT6
LSB - CT5
USB - CT4
While on channel 19, connect your frequency counter to TP8 (inside the little metal enclosure next to CT4 and L16). Adjust on AM, CT6 to 34.9850 mHz. On LSB, adjsut CT5 to read 34.9825. On USB, adjsut CT4 to read 34.9825. |
Coyote
Intermediate Member
Username: Coyote
Post Number: 161
Registered: 11-2004
| | Posted on Wednesday, March 23, 2005 - 2:40 pm: |
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Thanks all, but I've done gotten rid of this radio.  |
Racer_x
Intermediate Member
Username: Racer_x
Post Number: 200
Registered: 2-2005
| | Posted on Wednesday, March 23, 2005 - 3:27 pm: |
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Yankee - Are they a Uniden chassis? That sounds like my Courier Centurion 40D which has a Uniden 858 SSB board. |
Kid_vicious
Intermediate Member
Username: Kid_vicious
Post Number: 306
Registered: 9-2004
| | Posted on Wednesday, March 23, 2005 - 6:47 pm: |
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yes, racer x, the trc457, and 458 are uniden chassis. they are the same board as the 139xlr, and the president madison. (my all time favorite chassis!) your courier centurion 40d is similar, but the parts labling is different. (CT7 in the 139xlr is CT3 in the courier.)
matt |
Al_lafon
Junior Member
Username: Al_lafon
Post Number: 42
Registered: 3-2005
| | Posted on Tuesday, June 21, 2005 - 10:21 pm: |
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I think it is a good radio have one now and it receives just find bet it was just a adjustment
problem my radio had been set up for most of the gain in the receive was on the high end of the band had a bad niose to singal when i got it but
after retune sounds good now been thinking of
puting in that 2SC2999 to get a better singal to noise.Don't write off a good old rig most times
a tuneup put it back to life.O the am did drop out from time to time was the relay tx that is.Now
i been DXing my rear off with BaerFoot! |
Coyote
Intermediate Member
Username: Coyote
Post Number: 249
Registered: 11-2004
| | Posted on Tuesday, June 21, 2005 - 11:31 pm: |
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Well darn, wished I'd held on to this one a little longer now.  |
