| Author |
Message |
    
Grizzbear0
New member
Username: Grizzbear0
Post Number: 2
Registered: 2-2003
| | Posted on Thursday, November 25, 2004 - 8:21 pm: | 
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I Have a Rci-2950 (old version) that seems to be suffering from front end overload (stations within a couple miles sounds garbled), i have changed
R78 from 2.2k to 6.8k and R49 (100k) to 33k. This has no effect on it. Any Help is Greatly Appreciated.
Also the Signal meter on recieve is not working, Transmit side the meter works fine.
Thanks once again. |
Grizzbear0
New member
Username: Grizzbear0
Post Number: 3
Registered: 2-2003
| | Posted on Sunday, November 28, 2004 - 4:53 am: |
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Got it fixed, Was a diode i missed, D-12, and changed D-11 while i was at, working like new now. |
Tech808
Moderator
Username: Tech808
Post Number: 4172
Registered: 8-2002
| | Posted on Sunday, November 28, 2004 - 12:16 pm: |
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Grizzbear0,
Glad you got it fixed. 
WELCOME TO THE COPPER FORUM!
Now we need to get you to signup for the CEF RADIO CLUB!
If you want to JOIN I can get all of your information from your Profile. 
Just let me know and I can sign you up.
Lon
Tech808
CEF808
N9OSN
Tech808@copperelectronics.com |
Kid_vicious
Junior Member
Username: Kid_vicious
Post Number: 46
Registered: 9-2004
| | Posted on Monday, November 29, 2004 - 2:05 am: |
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grizzbear0, was D12 burnt out or clipped? did you replace it or clip it? im curious as i own one of these radios. thanks |
Grizzbear0
New member
Username: Grizzbear0
Post Number: 4
Registered: 2-2003
| | Posted on Wednesday, December 01, 2004 - 1:21 am: |
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D-12 gave no reading at all, where it should have had around a 100ohm reading on Rx1, it showed nothing at all. when i pulled it from the radio it came all to pieces. |
Kid_vicious
Junior Member
Username: Kid_vicious
Post Number: 48
Registered: 9-2004
| | Posted on Wednesday, December 01, 2004 - 5:19 pm: |
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hey grizzbear0, where are you getting your mod info? i have not heard of the resistor changes you are referring to. also what were the replacement diodes that you used?
thanks
matt |
Grizzbear0
New member
Username: Grizzbear0
Post Number: 5
Registered: 2-2003
| | Posted on Wednesday, December 01, 2004 - 7:10 pm: |
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D-12,and D-11 are Germanium Diodes, on a VOM (Volt-Ohm Meter) these should read around 100ohms on the Rx1 Scale, where other diodes (silicon) will be around 10-15 ohms, Remember you will only get this reading one way on the diode.
Original Number for these diodes are 1N60P, or ECG553 or SK9975 can be used. |
Kid_vicious
Member
Username: Kid_vicious
Post Number: 50
Registered: 9-2004
| | Posted on Saturday, December 04, 2004 - 11:52 pm: |
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thanks grizzbear0, have you done any tx or mike circuit mods to your 2950? |
Grizzbear0
New member
Username: Grizzbear0
Post Number: 7
Registered: 2-2003
| | Posted on Sunday, December 05, 2004 - 2:16 am: |
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About the only mod I have tried so far is the diode (1n914) and resistor (50 ohm) mod to increase heavy swing at low power, works great. |
Kid_vicious
Member
Username: Kid_vicious
Post Number: 54
Registered: 9-2004
| | Posted on Monday, December 06, 2004 - 1:59 am: |
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i keep hearing about that mod but i have noticed many different resistor values, 100 ohm-390 ohm. so im a little leary of doing the mod. |
Grizzbear0
New member
Username: Grizzbear0
Post Number: 9
Registered: 2-2003
| | Posted on Wednesday, December 08, 2004 - 2:00 am: |
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I tried different values in another 2950 a good while back, had the best luck out of the 50ohm. |
Kid_vicious
Member
Username: Kid_vicious
Post Number: 65
Registered: 9-2004
| | Posted on Thursday, December 09, 2004 - 10:39 pm: |
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thanks for the tip grizzbear0. |
Grizzbear0
Junior Member
Username: Grizzbear0
Post Number: 11
Registered: 2-2003
| | Posted on Friday, December 10, 2004 - 5:39 am: |
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This page shows alot of modifications and the heavy swinger mod if interested.
http://members.toast.net/nsj/rci.htm |
Kid_vicious
Member
Username: Kid_vicious
Post Number: 69
Registered: 9-2004
| | Posted on Friday, December 10, 2004 - 7:30 pm: |
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thanks again grizzbear. |
