"In my early high school days all of my friends were errand-lawn work-carry out bag boys, while my easy money was coming in from modifying peoples
radios. They would buy the cheaper 45 RPM RCA automatic turntables instead of the much more expensive unit with the amp and cabinetry. I would than install
an RCA phono jack on their radios rear chassis apron and then go over to the osc section of the variable tuning condenser and ever so slightly peen a burr on the extreme
end of the rotor. In that manner when the radio was fully tuned to the 550 portion, the oscillator would disable ANY radio sound / static from the phono audio."
Is the purpose of the "peen" to short the two plates together? I might like to try, but don't want to do irreversible or unnecessary damage.
The victim in this case will be a poor little GE 400 AA5 in maroon plastic. In years gone by, some kid spilled airplane glue on the top of the cabinet. I've sanded and polished it up, but there's limits to what can be done for it. So the plan is to make it more appealing with an ipod/MP3/CD compatible RCA jack and an isolation tranny. A transformer from an old razor outlet, 20 volt amps, fits nicely in between the speaker and the chassis.
I've recapped the radio and have it playing AM nicely. I don't know if 'peening a burr' is needed, but it sounds interesting.
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:I dug this up in the archives. The subject was installing a jack for external audio devices.
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:"In my early high school days all of my friends were errand-lawn work-carry out bag boys, while my easy money was coming in from modifying peoples
:radios. They would buy the cheaper 45 RPM RCA automatic turntables instead of the much more expensive unit with the amp and cabinetry. I would than install
:an RCA phono jack on their radios rear chassis apron and then go over to the osc section of the variable tuning condenser and ever so slightly peen a burr on the extreme
:end of the rotor. In that manner when the radio was fully tuned to the 550 portion, the oscillator would disable ANY radio sound / static from the phono audio."
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:Is the purpose of the "peen" to short the two plates together? I might like to try, but don't want to do irreversible or unnecessary damage.
:The victim in this case will be a poor little GE 400 AA5 in maroon plastic. In years gone by, some kid spilled airplane glue on the top of the cabinet. I've sanded and polished it up, but there's limits to what can be done for it. So the plan is to make it more appealing with an ipod/MP3/CD compatible RCA jack and an isolation tranny. A transformer from an old razor outlet, 20 volt amps, fits nicely in between the speaker and the chassis.
:I've recapped the radio and have it playing AM nicely. I don't know if 'peening a burr' is needed, but it sounds interesting.
:
I have found that plugging the CD player in by way of a small coax speaker cord over-rides any AM radio signal that may be lurking in that region of the
tuner. (As noted by Sir Thomas Demody in a previous post.)
So a burr is not needed, but hey, I think I will try it so that I can say I did it and the process will be filed away on my cranial hard drive. Dankeschein, mienherr.
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:Sir John . . . . .
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:Hm m m m m m . . . .just now noting this entrys addition . . .but . . . . .
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:Archives . . .ARCHIVES . . . Good Lawdy . . . hope that you didn't go to the forums dedicated SEARCH . . .and type in Big E little double dee, along with the FORUMS square and then let 'er rip, in which case it would then buzz and whirr for somewhat of a time span at the server and then spit out referencing to ~60 pages of 100 entries per page for a summation of ~ 6,500 documents.
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:I have provided the photo of the treatment of the very edge of either outermost rotor plates of the smaller oscillator section of a tuning condenser.
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:The red arrow is referring to THE altered plate corner, while I chose to use the much closer Rf plate to illustrate its formations methodology.
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:I would have the condenser fully at its open / unmeshed position and against its stop.
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:The black bar is depicting where I inserted a small machinists awl's tip and rested the tip against the bakelite wafer which holds the spacing of the plates. Then a slight tappa tappa action until I got ~ 1/32 nths of that corner tab bent inward. That way, when the condenser is COMPLETELY meshed, that tab will short out the oscillator section and give complete receiver silence.
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:My very small hammer used was one of those "housewifes kitchen tool drawer" items which was a very, very small hammer with a brass handle that also had 3-4 nestled screwdrivers that screwed into each other . . . a la Russkie matryoshka / babuska doll style.
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:Procedure:
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:Now -a- days if doing the same thing, I would have remembered the diagonal cutters . . . how you Amerikanski say . . ."dikes" . . . of use ~50 years ago as being SO bulky and cumbersome as to almost be in the castration cutters category.
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: A pair of my fine small Swedish diagonal cutters has such a fineness of its blades that I should just be able to catch that final 1/64 of an inch of the rotor plates tip and bend it inwards to form that shape.
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:Thasssitt . . . . .
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:73's de Edd
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:ALWAYS Buckle up. It makes it harder for the aliens to snatch you from your car.
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::I dug this up in the archives. The subject was installing a jack for external audio devices.
::
::"In my early high school days all of my friends were errand-lawn work-carry out bag boys, while my easy money was coming in from modifying peoples
::radios. They would buy the cheaper 45 RPM RCA automatic turntables instead of the much more expensive unit with the amp and cabinetry. I would than install
::an RCA phono jack on their radios rear chassis apron and then go over to the osc section of the variable tuning condenser and ever so slightly peen a burr on the extreme
::end of the rotor. In that manner when the radio was fully tuned to the 550 portion, the oscillator would disable ANY radio sound / static from the phono audio."
::
::Is the purpose of the "peen" to short the two plates together? I might like to try, but don't want to do irreversible or unnecessary damage.
::The victim in this case will be a poor little GE 400 AA5 in maroon plastic. In years gone by, some kid spilled airplane glue on the top of the cabinet. I've sanded and polished it up, but there's limits to what can be done for it. So the plan is to make it more appealing with an ipod/MP3/CD compatible RCA jack and an isolation tranny. A transformer from an old razor outlet, 20 volt amps, fits nicely in between the speaker and the chassis.
::I've recapped the radio and have it playing AM nicely. I don't know if 'peening a burr' is needed, but it sounds interesting.
::
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