1962 Victor restoration
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Re: 1962 Victor restoration
Yes, it looks like I would need tools/knowledge I don't have.
To update: In the amp I replaced the big can- 100uF plates/47uF screens/47uf 6FQ7/47(63v cathode bypass).
I replaced the 15k power feed to the 6FQ7 but left the drifted plate resistors alone. One was still 100k spec actually, one was 120k. I'm fine with that.
Sounds real good, the bass response is deeper & less muddy.
Next, to the tuner, rish me ruck......
To update: In the amp I replaced the big can- 100uF plates/47uF screens/47uf 6FQ7/47(63v cathode bypass).
I replaced the 15k power feed to the 6FQ7 but left the drifted plate resistors alone. One was still 100k spec actually, one was 120k. I'm fine with that.
Sounds real good, the bass response is deeper & less muddy.
Next, to the tuner, rish me ruck......
firemedic- Member
- Number of posts : 17
Registration date : 2011-05-22
Re: 1962 Victor restoration
Done. The IF feed resistors were both 5.6k, I replaced those w/ 4.7ks. There was only one last electrolytic, a 2uF in the FM detector, I replaced it with a 4.7uf since that was all I had.
The preamp feeds were surprisingly close to spec so they stayed.
The FM performance is noticeably better, and I get a nice strong signal with AFC on (what is that anyway?) tho it's still a little touchy when dialing my station in. It may be a weak station, the commercial ones come in very well...
It's on in the other room, loud as it will go, and it sounds so much better than my SS stereo system.
Thanks repairtech, Bill, Gary Rabbitt and everyone else for sitting on me about the lytics and everything else.
The preamp feeds were surprisingly close to spec so they stayed.
The FM performance is noticeably better, and I get a nice strong signal with AFC on (what is that anyway?) tho it's still a little touchy when dialing my station in. It may be a weak station, the commercial ones come in very well...
It's on in the other room, loud as it will go, and it sounds so much better than my SS stereo system.
Thanks repairtech, Bill, Gary Rabbitt and everyone else for sitting on me about the lytics and everything else.
firemedic- Member
- Number of posts : 17
Registration date : 2011-05-22
Re: 1962 Victor restoration
Yer welcome....
Bill Cahill
Bill Cahill
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Bill Cahill- Admin
- Number of posts : 4423
Age : 69
Registration date : 2008-03-12
Re: 1962 Victor restoration
firemedic wrote:The FM performance is noticeably better, and I get a nice strong signal with AFC on (what is that anyway?) tho it's still a little touchy when dialing my station in.
AFC = Automatic Frequency Control
You turn it OFF to tune in a station..
Once you get tuned properly (tuning eye closed), you turn the AFC ON.
This NOW locks the tuning, keeping it from drifting off-station (tubes as they warm up tend to drift)
repairtech- Member
- Number of posts : 97
Registration date : 2010-04-28
Re: 1962 Victor restoration
Boy, can I attest to that!
I have a 1959 Motorola am-fm table radio that DOES NOT have AFC, and, BOY, does it drift!
Bill Cahill
I have a 1959 Motorola am-fm table radio that DOES NOT have AFC, and, BOY, does it drift!
Bill Cahill
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Bill Cahill- Admin
- Number of posts : 4423
Age : 69
Registration date : 2008-03-12
Re: 1962 Victor restoration
Well Bill, it's not impossible to implement "AFC" into such things.
AFC basically is a "centering" voltage that is taken off the discriminator, and fed back to the local oscillator.
When a station drifts, the voltage changes, causing the oscillator to "drift back" in line.
The circuit is common among most radio tuners, and a little probing of schematics might just come up with a suitable "add-on".
AFC basically is a "centering" voltage that is taken off the discriminator, and fed back to the local oscillator.
When a station drifts, the voltage changes, causing the oscillator to "drift back" in line.
The circuit is common among most radio tuners, and a little probing of schematics might just come up with a suitable "add-on".
repairtech- Member
- Number of posts : 97
Registration date : 2010-04-28
Re: 1962 Victor restoration
Thanks. I don't have any of the later schematics, so, not much probing I can do.
If I get the model of the radio, could you look it up in Sams, and, find me an easy to build workable schematic for me? Could the switch be put on the back cover?
Are wire lenghths crittical?
Placement?
Thanks for your help.
Bill Cahill
If I get the model of the radio, could you look it up in Sams, and, find me an easy to build workable schematic for me? Could the switch be put on the back cover?
Are wire lenghths crittical?
Placement?
Thanks for your help.
Bill Cahill
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Please also join us here; www.videokarma.org/index.php
Bill Cahill- Admin
- Number of posts : 4423
Age : 69
Registration date : 2008-03-12
Re: 1962 Victor restoration
If I had the specific schematic of that radio I might be able to design something.
Most likely, 2 resistors,a .047 cap, and a germanium diode is all that's needed.
Wiring is not critical, a switch can be placed anywhere.
Most likely, 2 resistors,a .047 cap, and a germanium diode is all that's needed.
Wiring is not critical, a switch can be placed anywhere.
repairtech- Member
- Number of posts : 97
Registration date : 2010-04-28
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