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Jewell TR-1 "Thunderbolt"
6/17/2013 4:53:53 PMDave Froehlich
Hello All,
Does anyone have the schematic for this radio? It says TR-4 on the the PC board. Someone replaced some of the capacitors and I'd like to double check that everything is correct.
This radio had two problems in general, for this model. One of the screws that holds it in the case goes right through the frame of the tuning capacitor. If it's tightened too tight it bends and breaks off one of the plates, which I found floating around inside the case. It still works fine without that outer plate in the oscillator section.
The other problem is that the speaker is attached to the PC board by it's magnet with a single screw.. The weight of the speaker flexes the board and breaks lands, which then have to be replaced with real wires. Maybe that's why there are so few of these still in use.

Thanks,

Dave

6/17/2013 4:57:51 PMDave Froehlich
Hello Again All,
I forgot to say that this is an early transistor radio ( late 50s, early 60s) in a leather case. Knobs are on the sides, and a handle is on top. The front has a speaker grill and a logo "Jewel All Transistor Made in U.S.A." The logo is on the lower right side under the grill.

Thanks Again,

Dave
:Hello All,
: Does anyone have the schematic for this radio? It says TR-4 on the the PC board. Someone replaced some of the capacitors and I'd like to double check that everything is correct.
: This radio had two problems in general, for this model. One of the screws that holds it in the case goes right through the frame of the tuning capacitor. If it's tightened too tight it bends and breaks off one of the plates, which I found floating around inside the case. It still works fine without that outer plate in the oscillator section.
:The other problem is that the speaker is attached to the PC board by it's magnet with a single screw.. The weight of the speaker flexes the board and breaks lands, which then have to be replaced with real wires. Maybe that's why there are so few of these still in use.
:
:Thanks,
:
:Dave
:

6/17/2013 7:00:39 PMPaul Knaack
:Hello Again All,
: I forgot to say that this is an early transistor radio ( late 50s, early 60s) in a leather case. Knobs are on the sides, and a handle is on top. The front has a speaker grill and a logo "Jewel All Transistor Made in U.S.A." The logo is on the lower right side under the grill.
:
:Thanks Again,
:
:Dave
::Hello All,
:: Does anyone have the schematic for this radio? It says TR-4 on the the PC board. Someone replaced some of the capacitors and I'd like to double check that everything is correct.
:: This radio had two problems in general, for this model. One of the screws that holds it in the case goes right through the frame of the tuning capacitor. If it's tightened too tight it bends and breaks off one of the plates, which I found floating around inside the case. It still works fine without that outer plate in the oscillator section.
::The other problem is that the speaker is attached to the PC board by it's magnet with a single screw.. The weight of the speaker flexes the board and breaks lands, which then have to be replaced with real wires. Maybe that's why there are so few of these still in use.
::
::Thanks,
::
::Dave
::
:
Hello Dave, Im not sure but I think this is the same as the jewell tr1
http://www.freeinfosociety.com/electronics/schemview.php?id=1924
Best regards, Paul
:
6/18/2013 7:47:06 PMDave Froehlich
Paul,
The link takes me to a page with a Regency TR-1 schematic on it. This is a Jewel TR-1 NOT a Regency TR-1. There IS a big difference between the two radios.

Thanks,

Dave
::Hello Again All,
:: I forgot to say that this is an early transistor radio ( late 50s, early 60s) in a leather case. Knobs are on the sides, and a handle is on top. The front has a speaker grill and a logo "Jewel All Transistor Made in U.S.A." The logo is on the lower right side under the grill.
::
::Thanks Again,
::
::Dave
:::Hello All,
::: Does anyone have the schematic for this radio? It says TR-4 on the the PC board. Someone replaced some of the capacitors and I'd like to double check that everything is correct.
::: This radio had two problems in general, for this model. One of the screws that holds it in the case goes right through the frame of the tuning capacitor. If it's tightened too tight it bends and breaks off one of the plates, which I found floating around inside the case. It still works fine without that outer plate in the oscillator section.
:::The other problem is that the speaker is attached to the PC board by it's magnet with a single screw.. The weight of the speaker flexes the board and breaks lands, which then have to be replaced with real wires. Maybe that's why there are so few of these still in use.
:::
:::Thanks,
:::
:::Dave
:::
::
:Hello Dave, Im not sure but I think this is the same as the jewell tr1
:http://www.freeinfosociety.com/electronics/schemview.php?id=1924
:Best regards, Paul
::
:

6/18/2013 9:11:52 PMEdd









Sir Dave. . . .



Yep . . . . there is NO similarity some-what-no-ever, from the day ONE Regency pocket sized TR-1 unit and its
all telling 22 1/2 volt hearing aid battery that it requires.

(I don't ever remember seeing other than RED cases )


I sure wouldn't to have one of them nowadays, and try
to find that cell.


If THIS is your unit , and with the HEAVY pcb traces, can't see that being a hard repair problem.



Ref:








Note the thunderBOLD and not a thunderbolt !



As you can see . . . Radio Museum has the schematic . . . if you are a miembro of their Secretive Maternity Fraternity Society .

Get it playing and then give it an environmental shake chamber worthiness vibrational test, using MULTIPLE tapping with a plastic handle end of a small pocket sized screwdriver .

73's de Edd




Anything worth fighting for is worth fighting dirty for.




:Paul,
: The link takes me to a page with a Regency TR-1 schematic on it. This is a Jewel TR-1 NOT a Regency TR-1. There IS a big difference between the two radios.
:
:Thanks,
:
:Dave
:::Hello Again All,
::: I forgot to say that this is an early transistor radio ( late 50s, early 60s) in a leather case. Knobs are on the sides, and a handle is on top. The front has a speaker grill and a logo "Jewel All Transistor Made in U.S.A." The logo is on the lower right side under the grill.
:::
:::Thanks Again,
:::
:::Dave
::::Hello All,
:::: Does anyone have the schematic for this radio? It says TR-4 on the the PC board. Someone replaced some of the capacitors and I'd like to double check that everything is correct.
:::: This radio had two problems in general, for this model. One of the screws that holds it in the case goes right through the frame of the tuning capacitor. If it's tightened too tight it bends and breaks off one of the plates, which I found floating around inside the case. It still works fine without that outer plate in the oscillator section.
::::The other problem is that the speaker is attached to the PC board by it's magnet with a single screw.. The weight of the speaker flexes the board and breaks lands, which then have to be replaced with real wires. Maybe that's why there are so few of these still in use.
::::
::::Thanks,
::::
::::Dave
::::
:::
::Hello Dave, Im not sure but I think this is the same as the jewell tr1
::http://www.freeinfosociety.com/electronics/schemview.php?id=1924
::Best regards, Paul
:::
::
:
:

6/19/2013 10:13:25 AMDave Froehlich
Edd,
I have one here that has "THUNDERBOLT" spelled correctly on the inside of the back cover.

Thanks,

Dave
:
:

:
:
:
:
:
:
:
:
:
:
:
:Sir Dave. . . .
:
:
:
:
:
:Yep . . . . there is NO similarity some-what-no-ever, from the day ONE Regency pocket sized TR-1 unit and its
:all telling 22 1/2 volt hearing aid battery that it requires.
:
:(I don't ever remember seeing other than RED cases )
:
:
:I sure wouldn't to have one of them nowadays, and try
:to find that cell.
:
:
:If THIS is your unit , and with the HEAVY pcb traces, can't see that being a hard repair problem.
:
:
:
:Ref:
:
:
:
:
:
:
:
:
:Note the thunderBOLD and not a thunderbolt !
:
:
:
:
:
:As you can see . . . Radio Museum has the schematic . . . if you are a miembro of their Secretive Maternity Fraternity Society .
:
:
:
:Get it playing and then give it an environmental shake chamber worthiness vibrational test, using MULTIPLE tapping with a plastic handle end of a small pocket sized screwdriver .
:
:
:
:73's de Edd

:
:
:
:
:
:Anything worth fighting for is worth fighting dirty for.
:
:
:
:

:
:
:

:
:
:
::Paul,
:: The link takes me to a page with a Regency TR-1 schematic on it. This is a Jewel TR-1 NOT a Regency TR-1. There IS a big difference between the two radios.
::
::Thanks,
::
::Dave
::::Hello Again All,
:::: I forgot to say that this is an early transistor radio ( late 50s, early 60s) in a leather case. Knobs are on the sides, and a handle is on top. The front has a speaker grill and a logo "Jewel All Transistor Made in U.S.A." The logo is on the lower right side under the grill.
::::
::::Thanks Again,
::::
::::Dave
:::::Hello All,
::::: Does anyone have the schematic for this radio? It says TR-4 on the the PC board. Someone replaced some of the capacitors and I'd like to double check that everything is correct.
::::: This radio had two problems in general, for this model. One of the screws that holds it in the case goes right through the frame of the tuning capacitor. If it's tightened too tight it bends and breaks off one of the plates, which I found floating around inside the case. It still works fine without that outer plate in the oscillator section.
:::::The other problem is that the speaker is attached to the PC board by it's magnet with a single screw.. The weight of the speaker flexes the board and breaks lands, which then have to be replaced with real wires. Maybe that's why there are so few of these still in use.
:::::
:::::Thanks,
:::::
:::::Dave
:::::
::::
:::Hello Dave, Im not sure but I think this is the same as the jewell tr1
:::http://www.freeinfosociety.com/electronics/schemview.php?id=1924
:::Best regards, Paul
::::
:::
::
::
:
:



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