1951 Pontiac Chieftain

[PhilA]

20200514_132040.jpg (493.87 KiB) Viewed 4048 times

Back to this! Got my radio on the bench, gonna rebuild it.


Phil

[Frogchod]

Ah, more valves to frustrate you

[MLOR]

20200514_132040.jpg

Back to this! Got my radio on the bench, gonna rebuild it.


Phil

In another place you asked "Why are the Centre Taps of the Primary and the Secondary of the transformer connected?"

It is to prevent the Secondary floating at an offset from the primary.
Or at least that is what I was told when I used to repair UK Military Kit that had Trembler Inverters.

(Like Neutral is bonded to Earth at the Power Station in the UK (other countries may do things differently))

HTH

(I read some threads on that forum but no longer post on there.)

[PhilA]

In another place you asked "Why are the Centre Taps of the Primary and the Secondary of the transformer connected?"

It is to prevent the Secondary floating at an offset from the primary.
Or at least that is what I was told when I used to repair UK Military Kit that had Trembler Inverters.

(Like Neutral is bonded to Earth at the Power Station in the UK (other countries may do things differently))

HTH

(I read some threads on that forum but no longer post on there.)

It does help. Thank you.

[MLOR]

In another place you asked "Why are the Centre Taps of the Primary and the Secondary of the transformer connected?"

It is to prevent the Secondary floating at an offset from the primary.
Or at least that is what I was told when I used to repair UK Military Kit that had Trembler Inverters.

(Like Neutral is bonded to Earth at the Power Station in the UK (other countries may do things differently))

HTH

(I read some threads on that forum but no longer post on there.)

It does help. Thank you.

You're entirely welcome.

Thank You, for a thread about your restoration that, I and my wife, have had great enjoyment from.
We will almost certainly never meet, but "have a drink on me!"

[PhilA]

Ha, shall do

Got the component parts ordered that I don't have on the shelf, ordered a bunch of tested 12V tubes.
Hopefully in the next few weeks this might begin to emit some noises (other than pop, crackle, RRRRRRRR, zort or any that it really shouldn't make).

Phil

[PhilA]

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Bench set up and calibrated. Waiting on parts to arrive (big chunk of it is coming from Canada, the rest California).

Phil

[PhilA]

One tube arrived in the mail this morning. That was surprisingly quick.

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The chassis tang broke off the ground lug of the vibrator socket so I improvised and made a new one.

20200518_173233.jpg (510.4 KiB) Viewed 3930 times

Reassembled, wired up and tested.

Putting a 9v pp3 battery on the input makes the output of the transformer peg my meter set to 1500VAC so I think that's working well enough.

Phil

[PhilA]

Just went through the volume and tone circuit to discover it has automatic loudness compensation.
That's pretty smart for a car radio.

Phil

[PhilA]

20200519_183037.jpg (317.03 KiB) Viewed 3898 times

On a whim, I bought a locally themed, locally made keyring for my keys.

Phil