| Author |
Message |
    
Redstripe
| | Posted on Friday, October 24, 2003 - 10:34 pm: | 
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Weird problem with my Grant LT. It was working, moved it to a different room, rehooked the antenna etc. but now when i key the mike, nothing happens, the RF\power guage actually moves backwards, and the SWR meter i have hooked up does nothing at all. i've checked all connections, and even tried different coax and antennas. Any ideas? Also, if this radio is broken, does copper do these types of repairs and what possible price range would i be looking at?
Thanks
Matthew |
Kc0gxz
| | Posted on Friday, October 24, 2003 - 11:40 pm: |
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Redstripe
This may sound silly to you and I'm certainly not trying to insult your intelligents but, I have two questions.
1- Does the transmit/receice LED change colors when you key the mic?
2- Did you possibly bump the "mode" control to the wrong (USB/LSB or PA) posistion?
I've been known to do things such as that without realizing it. As a matter of fact, its been brought to my attention quite often of things that I have done that I don't remember doing. But of course I know very well that I'm being set up by someone around here.
Jeff, kc0gxz.
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RedStripe
| | Posted on Saturday, October 25, 2003 - 12:06 am: |
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Kc0gxz,
The led does change when i key the mike, and it doesnt seem to be doing much in any mode :-(
RedStripe |
RCI 2990
| | Posted on Saturday, October 25, 2003 - 1:21 am: |
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Hmmmmm sounds like a radio i had once! I had a galaxy DX 2527 once and had to move it off my desk because i had to clean the radio room ( got really dusty in there!). I put the radio on the spare bed and 1 hr later rehooked the radio up and turned it on and nothing, no RX and NO TX... It was wierd as heck... I was lost.. Later found out my audio chip was fried!!!! Dunno why either and to this day it had me stumped...... |
307
| | Posted on Saturday, October 25, 2003 - 8:06 am: |
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Check to make sure the inside of the antenna connector is tight when screwing in the PL-259 and it is not just going down the center without touching. In other words make sure it is not "spread open".
307 |
RedStripe
| | Posted on Saturday, October 25, 2003 - 10:04 am: |
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307,
Thats kind of what i was thinking too, but i dont think thats it either :-( It is recieving, and i opened it up and checked for continuity between the backside of the plug and the center wire of the coax.
RCI 2990,
If the audio chip is fried, is this repairable?
Also when i opened the radio, i noticed a few wires looked like they had been spliced together, 2 looked like they were going to the meter, and a few in other places. This radio was supposed to have had a tuning job according to the previous owner. Could this be the problem?
Thanks,
RedStripe |
Crafter
| | Posted on Saturday, October 25, 2003 - 1:19 pm: |
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Does the PA work ?? |
RCI 2990
| | Posted on Saturday, October 25, 2003 - 3:54 pm: |
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Audio chip is repairable... That is if you can still get parts for the rig... |
Adshar64
| | Posted on Saturday, October 25, 2003 - 3:58 pm: |
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Does receive work? When you say "does nothing" does that include receive or just the tx side?
cheers |
RedStripe
| | Posted on Saturday, October 25, 2003 - 11:47 pm: |
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Dont have a speaker to test the PA, but maybe i can find one in the morning. Recieve seems to work but it wont transmit.
Thanks for the help so far |
ss8541
| | Posted on Sunday, October 26, 2003 - 1:09 am: |
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redstripe, it sounds like a rare problem, but one that happens time to time. you say that everything worked fine until you moved the radio to another room. that means that the power was definitely removed. it sounds to me like a voltage/current spike happened when the power was added back to the radio(power supply turned on) and most likely blew the driver or final. [-note- some may say it could be the am modulator gone, but it can't be because you don't have ssb output either, so that rules out the am modulator.] if the final is gone, then you should be able to hear the grants tx on a radio that is very close by(like in the same room). if the driver is gone, you will not be able to hear the modulation of the grant since the driver is the 1st rf level to be modulated. that is for am. in ssb you should be able to pick the signal up on another radio if it is really close to the grant(like on top of it). you can even use a scanner.
and you may want to check your antenna system. out of the few times(2 times) that i have seen this, the antenna system was not up to par. what i concluded from this is that the high reflected power weakened the finals junctions over time. and the last time when the radios power was removed and reapplied, the sudden voltage and current inrush blew the junction. i have only seen this in truckers radios and not bases, and the only ones that i have seen this in is the transformer modulated cobras/unidens. so this may not be your problem, but it is the only thing that i can come up with -if- all that was done is you moving the radio from one room to another. |
RedStripe
| | Posted on Tuesday, October 28, 2003 - 4:08 pm: |
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ok sorry for the delay but PA mode seems to work. so basically it seems to recieve, responds when i push the PTT button, but according to the meter isnt transmitting. I turned on a handheld i have and i could pick myself up on it but not as loud and clear as i would think. (this is only about 5ft away). If i havent mentioned this already, the microphone wire does have a cut on the outside, but i cant tell if it goes beyond that.
Lastly, does copper do these types of repairs and would it be worth it price wise. |
ss8541
| | Posted on Tuesday, October 28, 2003 - 8:22 pm: |
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ok, if you could hear yourself on a handheld (a$$uming you are in am mode), then this means that the final is gone. that fact that it wasn't clear also supports this. that means that only the driver is running and not into a load that it likes (a final that is working properly). this also means that you -did- experience a voltage spike when power was re-applied.
as far as i know copper/tech307 does do these repairs. an email to him would let you know for sure. |
RedStripe
| | Posted on Thursday, October 30, 2003 - 11:09 pm: |
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Thanks,
how would i go about getting his email?
NOTE!
Redstripe, Very Simple:
Tech307@copperelectronics.com
Lon
Tech808
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