| Author |
Message |
    
Leadfoot
| | Posted on Thursday, May 15, 2003 - 6:58 pm: | 
|
I have changed Mics, no change
Rewired plug on Radio, no change
Changed plug to 4-pin, no change
Changed antenna's, Coax, no change
even had another "techie" look at it, but the squeal couldn't be located till he was about to unhook his coax, but still couldnt locate the problem....
ummm help?? |
Tech808
| | Posted on Sunday, May 18, 2003 - 7:31 pm: |
|
Leadfoot,
Standard wiring for your radio should have been:
PIN #1 ~ SHIELD
PIN #2 ~ N/C
PIN #3 ~ TRANSMIT
PIN #4 AUDIO
PIN #5 ~ RECEIVE
What kind of other mics did you try?
Lon
Tech808 |
Leadfoot
| | Posted on Monday, May 19, 2003 - 8:18 am: |
|
i purchased this radio with a realistic powered desk mike, with worked fine for the first year of ownership, then when the squeal started i purchased a realistic hand mike, not powered, my modulation dropped considerably but the squeal was still there, since my turner supersidekick was eating batteries left and right i found a turner +2, mind you ALL the mikes had the same result, i even resoldered the wires hoping to remedy the problem to no avail, another friend suggested maybe the transmit relay was dying, if so is it difficult to replace? can i easily find a replacement? |
Leadfoot
| | Posted on Tuesday, May 20, 2003 - 5:57 pm: |
|
plus i would like to know if there are any manuals online i can get to do other mods? |
Bushwacker5454
New member
Username: Bushwacker5454
Post Number: 4
Registered: 4-2004
| | Posted on Monday, November 01, 2004 - 1:56 am: |
|
I also need info for this radio
Thanks |
Dindin
Intermediate Member
Username: Dindin
Post Number: 423
Registered: 2-2004
| | Posted on Monday, November 01, 2004 - 7:02 pm: |
|
Leadfoot,
what is your swr on your system?Your last sentence in your first post gives the best clue.as for your ssk eating batteries I would guess the reed switch needs adjusted in the mic itself(staying closed when mic is unkeyed putting a constant drain on battery)I normally change my battery about once a year long before it dies,and it is my most heavly used mic. |
Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 124
Registered: 3-2005
| | Posted on Saturday, December 17, 2005 - 7:34 pm: |
|
Put a 50 load on it and see if it has the squeal
still if you ecer been in this radio check the
wires coming into it by moving them when keyed
up. if all is ok then try this rf filter its
a 1k ristor and a .01 cap put it in the mic
just at the amp board. |
Spenwright
New member
Username: Spenwright
Post Number: 1
Registered: 1-2006
| | Posted on Monday, January 02, 2006 - 10:06 am: |
|
I had the same problem back in 1984 when i had my first one. There was a problem with the radio and mine was fixed. I'll look around for the invoice that i was given when i had it fixed. This is a really good radio when working right I had my first one modified and with a super scanner antenna I was hitting england very easy.
Sam |
Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 161
Registered: 3-2005
| | Posted on Friday, January 13, 2006 - 8:58 pm: |
|
I have a TRC-459 i am trying to get it aligned on
the 7.8 Mhz Osc is giving me fits can not get any
good reading on AM,USB or LSB got the 10.240 and
17Mhz osc's in ok. Any help with this?
Thankyou Al |
Wildrat
Advanced Member
Username: Wildrat
Post Number: 642
Registered: 12-2003
| | Posted on Friday, January 13, 2006 - 10:37 pm: |
|
Bring it to a real tech. |
Al_lafon
Intermediate Member
Username: Al_lafon
Post Number: 163
Registered: 3-2005
| | Posted on Saturday, January 14, 2006 - 7:08 pm: |
|
Well what the heck tryed it today and counter locked in very frist try just don't know what
the heck was up fri. well got it all tuned.
O a foot note here if you ever see the TRC-459
the Sams for the 480 will work but 17 and 7.8
alignment are not in same order on the board. |
Unit199
Intermediate Member
Username: Unit199
Post Number: 227
Registered: 8-2003
| | Posted on Wednesday, January 18, 2006 - 4:29 am: |
|
Leadfoot, check modulation pot and clean it. this sometimes causes squeal.
HARVE |
