| Author |
Message |
    
Md971
New member
Username: Md971
Post Number: 1
Registered: 10-2014
| | Posted on Sunday, February 08, 2015 - 1:03 pm: | 
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Dead key adj point ?
Short explanation of vr14 bias adj? |
Sonoma
Intermediate Member
Username: Sonoma
Post Number: 315
Registered: 11-2001
| | Posted on Sunday, February 08, 2015 - 10:22 pm: |
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is this the 138 23 channel or the 138xlr 40 channel radio |
Md971
New member
Username: Md971
Post Number: 2
Registered: 10-2014
| | Posted on Tuesday, February 10, 2015 - 1:36 pm: |
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That would be a 23 chanel.. |
Md971
New member
Username: Md971
Post Number: 3
Registered: 10-2014
| | Posted on Wednesday, February 11, 2015 - 11:45 am: |
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After reading post after post. I t doesn't seem like too many people would bother to tinker with with these 23 chan. Rigs!
Well I picked up a bone stock working 138a.
This is what I have this is what I'd like to work on on. So any information would be greatly appreciated.
Few questions.
I'm looking for documentation on all the test pins. Maybe service manual. ?
"Crystals" is there a way to test them? Like a ohm reading?
in the hc-25/u form are the different brands mixable to achieve desired freq. Or would it be best to stay with the uni brand that's in this rig?
On the power mod
Says cut d40 a d d41
Is this cut and leave open or remove diode and repair trace with jumper or similar?
And vr15 for ssb. On the donor and the working radio I have. The spot is empty. I assume one needs to be installed.
Is this correct? At what value?
Receive mod? Or is it better left alone?
I'm in the process of recapping this radio using nichicon muse and fine gold caps
Any technical pro/cons to this?
One side question relating to 858 pll. In reference to legality.FCC outlawed! Is that in design, operation? |
Dale
Senior Member
Username: Dale
Post Number: 2178
Registered: 12-2002
| | Posted on Thursday, February 12, 2015 - 6:52 pm: |
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dont do the power mod.
replace/re[pair d40,d41
recieve mod maybe but i feel they dont need it
when properly setup.
fcc outlawed selling 23 ch units i think.
but i think you can legally use not modifyed
dale/a.k.a.hotrod
cef426
cvc#64
454 [dx numbers]
38lsb
|
Sonoma
Intermediate Member
Username: Sonoma
Post Number: 316
Registered: 11-2001
| | Posted on Friday, February 13, 2015 - 11:03 am: |
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I do not have a sams on this radio. it looks to be in the cb57 book. you might see if you can get one for the service manual. |
Dale
Senior Member
Username: Dale
Post Number: 2179
Registered: 12-2002
| | Posted on Friday, February 13, 2015 - 7:40 pm: |
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aftrer searching thru tune up manuals heres all i got
L8,L10 am power tune for best swing forward power
vr-15ssb power
modualtion =d40,d41 leave these along
should get good results with just L8,L10
dale/a.k.a.hotrod
cef426
cvc#64
454 [dx numbers]
38lsb
|
Md971
New member
Username: Md971
Post Number: 4
Registered: 10-2014
| | Posted on Saturday, February 14, 2015 - 9:00 pm: |
|
Hey Dale and Sonoma thanks for the help. I orderd a copy of cb-57. |
