| Author |
Message |
    
Bigfoot
Junior Member
Username: Bigfoot
Post Number: 25
Registered: 12-2001
| | Posted on Friday, June 02, 2006 - 7:10 pm: | 
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Does anyone know the value of R19? Mine is smoked and I need to replace it. Everything else appears to be fine, but the R19 resistor. It is so badly damaged I cannot tell what the color code is. |
Georgeodjungle
Intermediate Member
Username: Georgeodjungle
Post Number: 110
Registered: 1-2006
| | Posted on Saturday, June 03, 2006 - 1:03 pm: |
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i dodn't have a schematic.
but is it by the lil transformer?
not on the pill side? |
Bigfoot
Junior Member
Username: Bigfoot
Post Number: 26
Registered: 12-2001
| | Posted on Saturday, June 03, 2006 - 7:18 pm: |
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No, it is a resistor near the back of the amp,right next to the keying relay.My board is well labeled . The keying relay is the clear plastic box at the back of the amp. Looking at the amp from the back, the resistor R19 is just to the right of that box. |
Bigfoot
Junior Member
Username: Bigfoot
Post Number: 27
Registered: 12-2001
| | Posted on Monday, June 05, 2006 - 12:42 pm: |
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I think this resistor is part of the keying circut. When the amp is first turned on it "keys" briefly by itself. But it will not key when the radio is keyed. I double checked and it is R19 that I need to replace, I just need the part value, or the color code on the resistor.
Thanks!! |
Georgeodjungle
Intermediate Member
Username: Georgeodjungle
Post Number: 115
Registered: 1-2006
| | Posted on Wednesday, June 07, 2006 - 12:53 pm: |
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if it still works.
measure the resistor 1st.
then
carefully cut or unsolder one leg & take a meter to it.
if it is for the relay:
a lot of amps use the same on the 2 relays.
should be around 33k.
you only have to get close.
just a guess with out a schematic.
also how big is it "watts"? |
Bigfoot
Junior Member
Username: Bigfoot
Post Number: 30
Registered: 12-2001
| | Posted on Wednesday, June 07, 2006 - 7:49 pm: |
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Thanks George, but I really do not want to "trial and error" this thing. I posted this same question on another site and two people said that the R19 is RED BROWN BROWN GOLD. I took this info to my local electronics shop, and he gave me a 120 ohm 1 watt resistor. But it looks much larger than the damaged resistor in the amp. |
Tech808
Moderator
Username: Tech808
Post Number: 10216
Registered: 8-2002
| | Posted on Wednesday, June 07, 2006 - 8:29 pm: |
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Bigfoot,
RED/BROWN/BROWN/GOLD = 210 ohms, +/-5%
Calculate Resistor Values from Color Codes
Hope this help's,
Lon
Tech808
CEF808
N9CEF
CVC#2 |
Bigfoot
Junior Member
Username: Bigfoot
Post Number: 31
Registered: 12-2001
| | Posted on Thursday, June 08, 2006 - 12:35 pm: |
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Lon,
Thanks so much! I am going to guess that it is a 1/4 watt. But having the right value is the most important thing.
Thanks again! |
Bigfoot
Junior Member
Username: Bigfoot
Post Number: 32
Registered: 12-2001
| | Posted on Thursday, June 08, 2006 - 7:17 pm: |
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Tech808,
I installed the resistor and the amp is working flawlessly! Thanks again and keep up the good work.
Vern
"Bigfoot".........
73s |
