| Author |
Message |
    
Radiodude
Advanced Member
Username: Radiodude
Post Number: 573
Registered: 1-2002
| | Posted on Tuesday, March 03, 2009 - 5:03 pm: | 
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I picked up a Robyn 540d base with extra channels at a yard sale for cheap. It seems to have low receive! Are these radios really quiet on receive? Where would I look inside to bring the receive up?
Thanks
Ernie
KC8YOQ
Copper 123
Walkie Talkie
2NA750
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Tech291
Moderator
Username: Tech291
Post Number: 528
Registered: 11-2004
| | Posted on Tuesday, March 03, 2009 - 8:41 pm: |
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Ernie,
as old as that 540 would be,the first thing you might do is replace the electrolytic caps in the i.f. chain.I am starting to find a lot of bad ones in radios of similar age.I've never operated a 540 but a 520 was about as noisy as a uniden washington stock.
tech291
cef291/cvc6
kc8zpj |
Radiodude
Advanced Member
Username: Radiodude
Post Number: 574
Registered: 1-2002
| | Posted on Tuesday, March 03, 2009 - 9:45 pm: |
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Sorry it is a 520d NOT a 540!
Ernie
KC8YOQ
Copper 123
Walkie Talkie
2NA750
|
Radiodude
Advanced Member
Username: Radiodude
Post Number: 575
Registered: 1-2002
| | Posted on Tuesday, March 03, 2009 - 9:38 pm: |
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Great I can do that! What are the part numbers and where are they located?
Ernie
KC8YOQ
Copper 123
Walkie Talkie
2NA750
|
Slim1
Intermediate Member
Username: Slim1
Post Number: 151
Registered: 4-2002
| | Posted on Wednesday, March 04, 2009 - 4:58 pm: |
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The first thing I would do is clean the contacts
in the TX/RX relay. They are known to get dirty and cause the problem you're describing. I've had a couple of mine to do this as well. The other advice is great too.
Slim |
