I have a Philco 38-7. The speaker cone is shredded. Reconing seems to be expensive. Can I replace it with a PM speaker. I measured the field coil on the old speaker at about 1140 ohms. Can I just put a resistor in place of the field coil. Modern speakers seem to have very high power ratings compared to what this radio is rated at. Will it be capable of driving the newer type speaker.
Any info will be greatly appreciated.
Jim

Hi Jim

Yes you can replace your speaker with a modern PM type. Use a 1000 ohm @ 10 watts or greater wirewound resistor for the field. It will run very warm.

If your radio has objectional hum increase values of filter caps. A resistor won't filter as well as the otiginal field.

No problem driving a modern speaker. In most cases those are max power limits.

Norm

:I have a Philco 38-7. The speaker cone is shredded. Reconing seems to be expensive. Can I replace it with a PM speaker. I measured the field coil on the old speaker at about 1140 ohms. Can I just put a resistor in place of the field coil. Modern speakers seem to have very high power ratings compared to what this radio is rated at. Will it be capable of driving the newer type speaker.
:Any info will be greatly appreciated.
:Jim

Hi Norm'

Thanks for the info. I will give it a try.

Jim

:Hi Jim
:
: Yes you can replace your speaker with a modern PM type. Use a 1000 ohm @ 10 watts or greater wirewound resistor for the field. It will run very warm.
:
: If your radio has objectional hum increase values of filter caps. A resistor won't filter as well as the otiginal field.
:
: No problem driving a modern speaker. In most cases those are max power limits.
:
:Norm
:
:
:
::I have a Philco 38-7. The speaker cone is shredded. Reconing seems to be expensive. Can I replace it with a PM speaker. I measured the field coil on the old speaker at about 1140 ohms. Can I just put a resistor in place of the field coil. Modern speakers seem to have very high power ratings compared to what this radio is rated at. Will it be capable of driving the newer type speaker.
::Any info will be greatly appreciated.
::Jim

Jim:

I have a Philco 38-5 console model radio that had a tattered 12 inch speaker. I found a re-cone man that reconed the speaker for 45.00 and it sounds great. I have two 38-5's and on the first one I replaced the original speaker with a PM speaker; field coil with a 1200 ohm, 10 watt resistor,increased the electrolytics by about 2X and replaced the output transformer with a universal transformer from AES. It works OK but the time involved and the cost was higher than re-coning.
Use Google and search for recone.
Good luck.

Dave

:Hi Norm'
:
:Thanks for the info. I will give it a try.
:
:Jim
:
:
:
::Hi Jim
::
:: Yes you can replace your speaker with a modern PM type. Use a 1000 ohm @ 10 watts or greater wirewound resistor for the field. It will run very warm.
::
:: If your radio has objectional hum increase values of filter caps. A resistor won't filter as well as the otiginal field.
::
:: No problem driving a modern speaker. In most cases those are max power limits.
::
::Norm
::
::
::
:::I have a Philco 38-7. The speaker cone is shredded. Reconing seems to be expensive. Can I replace it with a PM speaker. I measured the field coil on the old speaker at about 1140 ohms. Can I just put a resistor in place of the field coil. Modern speakers seem to have very high power ratings compared to what this radio is rated at. Will it be capable of driving the newer type speaker.
:::Any info will be greatly appreciated.
:::Jim