Only '40 Pontiac in town with FM.
Harold
:Only '40 Pontiac in town with FM.
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:Harold
Sounds COOL! Tell me more about this....size of a pack of gum and 1.5 Amps? Veerrrrry interesting. (Apologies to 'Laugh In')
Lewis
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::Only '40 Pontiac in town with FM.
::
::Harold
:
:Sounds COOL! Tell me more about this....size of a pack of gum and 1.5 Amps? Veerrrrry interesting. (Apologies to 'Laugh In')
:Lewis
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::Only '40 Pontiac in town with FM.
::
::Harold
OK Lewis. Found on ebay; seller coldfusionx.
I had one concern--wondered if osc. freq. would cause any interference on AM but since we are feeding a strong signal thru shielded coax from converter to radio, I did not note any. The small size and cost amazed me.
Harold
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:Sounds COOL! Tell me more about this....size of a pack of gum and 1.5 Amps? Veerrrrry interesting. (Apologies to 'Laugh In')
:Lewis
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And lastly, the input and output's 100 ufd of filtering / decoupling. |
:::I was helping a vintage car enthusiast with his 1940 Pontiac 6V radio. He wanted to put an FM converter under dash. It requires 12V. On the web I found a DC/DC boost up converter--takes 3.4 to 40V in and provides 12V @ 1.5A out.I got one (about size of old pack of gum) and it works nicely--no heat sink required @ that power level. Cost was low.
:::Only '40 Pontiac in town with FM.
:::
:::Harold
:
:OK Lewis. Found on ebay; seller coldfusionx.
:I had one concern--wondered if osc. freq. would cause any interference on AM but since we are feeding a strong signal thru shielded coax from converter to radio, I did not note any. The small size and cost amazed me.
:
:Harold
::
::Sounds COOL! Tell me more about this....size of a pack of gum and 1.5 Amps? Veerrrrry interesting. (Apologies to 'Laugh In')
::Lewis
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: : : :  : : : : : : : :Hey . . . You'se Guys . . . . . : : :Boy . . . if only the angle of lighting was correct, one could even make out the part number of the power IC and its internal control electronics, all within that top left corner power chip . . .er . . . make that :CHIP : : :One can at least make out the 3 support chip resistors and 1 monolithic ceramic cap as well as the SS34 power diode, and probably a 100uh (hi current) buck coil for the inverter as that ferrite do-nut. : :And lastly, the input and output's 100 ufd of filtering / decoupling. : : : : : Q~~60_1.JPG) : : : : : : : 73's de Edd : : : : : The Top Bunk: Where you should NEVER put a child wearing Superman jammies.. : : : : :  : : : |
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::::I was helping a vintage car enthusiast with his 1940 Pontiac 6V radio. He wanted to put an FM converter under dash. It requires 12V. On the web I found a DC/DC boost up converter--takes 3.4 to 40V in and provides 12V @ 1.5A out.I got one (about size of old pack of gum) and it works nicely--no heat sink required @ that power level. Cost was low.
::::Only '40 Pontiac in town with FM.
::::
::::Harold
::
::OK Lewis. Found on ebay; seller coldfusionx.
::I had one concern--wondered if osc. freq. would cause any interference on AM but since we are feeding a strong signal thru shielded coax from converter to radio, I did not note any. The small size and cost amazed me.
::
::Harold
:::
:::Sounds COOL! Tell me more about this....size of a pack of gum and 1.5 Amps? Veerrrrry interesting. (Apologies to 'Laugh In')
:::Lewis
Looking back at Edd's post, I am impressed with his-
in depth knowledge of the device. So, Edd, are you an engineer?
Harold
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:::Only '40 Pontiac in town with FM.
:::
:::Harold
:
:OK Lewis. Found on ebay; seller coldfusionx.
:I had one concern--wondered if osc. freq. would cause any interference on AM but since we are feeding a strong signal thru shielded coax from converter to radio, I did not note any. The small size and cost amazed me.
:
:Harold
::
::Sounds COOL! Tell me more about this....size of a pack of gum and 1.5 Amps? Veerrrrry interesting. (Apologies to 'Laugh In')
::Lewis
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The FM converter is transistorized, so it draws minimal current. I wonder if it could be altered internally to operate on 6 volt? Edd wants us to make our own power converter, but I can't see that small anymore, let alone solder those little legs on those little chips.
I can think of using a step-up transformer.
What about a voltage doubler circuit? No, that little gizmo trumps all of the above.
I've been playing around with an FM converter that I picked up cheap somewhere years ago. It is fun to play FM on an old table radio, but it doesn't have AFC and the small knob makes tuning touchy.
Harold, tell your buddy to keep both hands on that big steering wheel. No power steering, 16" bias tires and an FM tuner with that tiny knob and dial, he'll need a copilot. :>)
::::Only '40 Pontiac in town with FM.
::::
::::Harold
::
::OK Lewis. Found on ebay; seller coldfusionx.
::I had one concern--wondered if osc. freq. would cause any interference on AM but since we are feeding a strong signal thru shielded coax from converter to radio, I did not note any. The small size and cost amazed me.
::
::Harold
:::
:::Sounds COOL! Tell me more about this....size of a pack of gum and 1.5 Amps? Veerrrrry interesting. (Apologies to 'Laugh In')
:::Lewis
::::
:::
:::
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::
:The FM converter is transistorized, so it draws minimal current. I wonder if it could be altered internally to operate on 6 volt? Edd wants us to make our own power converter, but I can't see that small anymore, let alone solder those little legs on those little chips.
:
:I can think of using a step-up transformer.
:What about a voltage doubler circuit? No, that little gizmo trumps all of the above.
:
:I've been playing around with an FM converter that I picked up cheap somewhere years ago. It is fun to play FM on an old table radio, but it doesn't have AFC and the small knob makes tuning touchy.
:Harold, tell your buddy to keep both hands on that big steering wheel. No power steering, 16" bias tires and an FM tuner with that tiny knob and dial, he'll need a copilot. :>)
:
Roger, John--Good point. He had to mount converter right of center under dash so he can not reach it very well while driving. So, co-pilot sounds good.
Harold
:::::Only '40 Pontiac in town with FM.
:::::
:::::Harold
:::
:::OK Lewis. Found on ebay; seller coldfusionx.
:::I had one concern--wondered if osc. freq. would cause any interference on AM but since we are feeding a strong signal thru shielded coax from converter to radio, I did not note any. The small size and cost amazed me.
:::
:::Harold
::::
::::Sounds COOL! Tell me more about this....size of a pack of gum and 1.5 Amps? Veerrrrry interesting. (Apologies to 'Laugh In')
::::Lewis
:::::
::::
::::
:::
:::
::The FM converter is transistorized, so it draws minimal current. I wonder if it could be altered internally to operate on 6 volt? Edd wants us to make our own power converter, but I can't see that small anymore, let alone solder those little legs on those little chips.
::
::I can think of using a step-up transformer.
::What about a voltage doubler circuit? No, that little gizmo trumps all of the above.
::
::I've been playing around with an FM converter that I picked up cheap somewhere years ago. It is fun to play FM on an old table radio, but it doesn't have AFC and the small knob makes tuning touchy.
::Harold, tell your buddy to keep both hands on that big steering wheel. No power steering, 16" bias tires and an FM tuner with that tiny knob and dial, he'll need a copilot. :>)
::
:Roger, John--Good point. He had to mount converter right of center under dash so he can not reach it very well while driving. So, co-pilot sounds good.
:Harold
:
Addendum--I meas. current drain on a couple of converters and found it to be 75--90 m.a.
Re: AFC; I have a NOS Spark-O-Matic and on the box it mentions having AFC that holds station +/- 300khz. I thought most of them had AFC. Anyway, fun things to play with.
Harold
::::::Only '40 Pontiac in town with FM.
::::::
::::::Harold
::::
::::OK Lewis. Found on ebay; seller coldfusionx.
::::I had one concern--wondered if osc. freq. would cause any interference on AM but since we are feeding a strong signal thru shielded coax from converter to radio, I did not note any. The small size and cost amazed me.
::::
::::Harold
:::::
:::::Sounds COOL! Tell me more about this....size of a pack of gum and 1.5 Amps? Veerrrrry interesting. (Apologies to 'Laugh In')
:::::Lewis
::::::
:::::
:::::
::::
::::
:::The FM converter is transistorized, so it draws minimal current. I wonder if it could be altered internally to operate on 6 volt? Edd wants us to make our own power converter, but I can't see that small anymore, let alone solder those little legs on those little chips.
:::
:::I can think of using a step-up transformer.
:::What about a voltage doubler circuit? No, that little gizmo trumps all of the above.
:::
:::I've been playing around with an FM converter that I picked up cheap somewhere years ago. It is fun to play FM on an old table radio, but it doesn't have AFC and the small knob makes tuning touchy.
:::Harold, tell your buddy to keep both hands on that big steering wheel. No power steering, 16" bias tires and an FM tuner with that tiny knob and dial, he'll need a copilot. :>)
:::
::Roger, John--Good point. He had to mount converter right of center under dash so he can not reach it very well while driving. So, co-pilot sounds good.
::Harold
::
:Addendum--I meas. current drain on a couple of converters and found it to be 75--90 m.a.
:Re: AFC; I have a NOS Spark-O-Matic and on the box it mentions having AFC that holds station +/- 300khz. I thought most of them had AFC. Anyway, fun things to play with.
:Harold
:
Mine is a Pulser. It drifts a bit. Works fine on a 12 vdc wall wart.