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Penrider
Intermediate Member
Username: Penrider
Post Number: 127
Registered: 1-2007
| | Posted on Sunday, May 27, 2007 - 6:26 am: | 
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OK...this is a talkback question...
On radios that have no speaker sound without mic plugged in, all you have to do to install talkback is put a resistor or VR pot between the positive of the ext. spkr and board ground, negative to negative from ext. spkr to pa(this is also how talkback ext. spkrs work), receive pin on mic connector to board ground, or mic with built in talkback...All you basically do is restore the speaker ground that the mic switches during tx...no problem...
Now, how is it done on radios that Does have speaker sound with mic unplugged??...the above mods don't work, also talkback ext. spkrs and talkback mics don't work...I've installed TB in more than a few radios, but this is the first time I've run into this little problem...
The particular radio here is a President Washington Base(not uniden, it has the 858pll)...I would like to use either a good echo board or a good echo mic, either way I have to Hear it to set it...any suggestions??
Sean
CEF867
CVC81
"Keep smiling, it makes people wonder what you're up to!!"
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Dale
Advanced Member
Username: Dale
Post Number: 905
Registered: 12-2002
| | Posted on Sunday, May 27, 2007 - 9:31 am: |
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i dont know how to do the mod your asking
about.but imho id just buy a handheld 452
echo mmike.rflimited makes some nice echo
mikes also but a little more money
dale/a.k.a.hotrod
cef426
cvc#64
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Penrider
Intermediate Member
Username: Penrider
Post Number: 128
Registered: 1-2007
| | Posted on Sunday, May 27, 2007 - 3:34 pm: |
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I have a Dm-452...and an echomax 2000...and an echo board...useless without talkback
Sean
CEF867
CVC81
"Keep smiling, it makes people wonder what you're up to!!"
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Penrider
Intermediate Member
Username: Penrider
Post Number: 133
Registered: 1-2007
| | Posted on Tuesday, May 29, 2007 - 10:33 pm: |
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ok...after some experimenting...I'm still not sure why none of the talkback mods I can find work on this radio, but the PA doesn't work...may be part of the problem...the internal speaker, external speaker, and headphones all work fine...since I never have and never will use PA(esp. on a base radio), I have no idea how PA works, or where to start checking to see if that's my problem....again gentlemen, and ideas????
Sean
CEF867
CVC81
"Keep smiling, it makes people wonder what you're up to!!"
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Panda_bear
Junior Member
Username: Panda_bear
Post Number: 26
Registered: 4-2005
| | Posted on Thursday, May 31, 2007 - 1:27 pm: |
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try installing a 100 ohm resistor between the ext sp
and pa on the solder side of the board
Tripple 5 in da Mag
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Penrider
Intermediate Member
Username: Penrider
Post Number: 134
Registered: 1-2007
| | Posted on Thursday, May 31, 2007 - 6:19 pm: |
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read my first post...Not ONE of the typical talkback mods work on this radio...I even tried a couple that aren't typical...I still think maybe the PA not working has something to do with it, but I have no idea what to do about it...
I don't need to sit and hear myself talk, but if I could find a way to get it to work Once, I could set everything and lock it down
Sean
CEF867
CVC81
"Keep smiling, it makes people wonder what you're up to!!"
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Dale
Advanced Member
Username: Dale
Post Number: 939
Registered: 12-2002
| | Posted on Thursday, May 31, 2007 - 9:23 pm: |
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well if ya dont get it fixed heres what i do
i use a uniden pro510 on a 2 amp p/s no antenna
sitting beside radio with everything hooked up
to.put both radios on same channel and youll
have instant talkback without any mods to the
radio.youll first have to adfjust volume on
the cb without a antenna cause it will squeal
ive found best results using a noice canmcelling
mike.though this will be impossible if your setting your echomaster2000 or s.s.452 eheo mike
dale/a.k.a.hotrod
cef426
cvc#64
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Penrider
Intermediate Member
Username: Penrider
Post Number: 139
Registered: 1-2007
| | Posted on Friday, June 01, 2007 - 12:05 am: |
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Dale...why didn't I think of that?...I have that same setup in my son's room(small antenna tho)...plus, I have several low power HT's...thanks
Sean
CEF867
CVC81
"Keep smiling, it makes people wonder what you're up to!!"
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