I have a few of these radios; I'm wanting to put together some battery
packs for them. Does anyone have a good schematic for a DC-DC
converter to take 9vdc to 90vdc?
I'm also going to need to make up a 4-prong connector for the battery
packs; any ideas anyone? Can the connectors be purchased? Thanks a
lot

Go to
rec.antiques.radio+phono

they can help you

"tack" wrote in message
oups.com...
I have a few of these radios; I'm wanting to put together some battery
packs for them. Does anyone have a good schematic for a DC-DC
converter to take 9vdc to 90vdc?
I'm also going to need to make up a 4-prong connector for the battery
packs; any ideas anyone? Can the connectors be purchased? Thanks a
lot

On Feb 3, 10:13 am, "Henry Kolesnik"
wrote:
Go to
rec.antiques.radio+phono

they can help you

"tack" wrote in message

oups.com...



I have a few of these radios; I'm wanting to put together some battery
packs for them. Does anyone have a good schematic for a DC-DC
converter to take 9vdc to 90vdc?
I'm also going to need to make up a 4-prong connector for the battery
packs; any ideas anyone? Can the connectors be purchased? Thanks a
lot- Hide quoted text -

- Show quoted text -


I did; didn't go so good. I thought I'd try here, since bein' what
I'm proposing to make is a homebrew, so is somewhat relevant to the
forum. Oh well, Guess I'll go hang out at the Yahoo groups for a
while; yahoo is my ISP anyway.

On Feb 4, 9:39 am, wrote:
On 2 Feb 2007 21:57:03 -0800, "tack" wrote:

I have a few of these radios; I'm wanting to put together some battery
packs for them. Does anyone have a good schematic for a DC-DC
converter to take 9vdc to 90vdc?
I'm also going to need to make up a 4-prong connector for the battery
packs; any ideas anyone? Can the connectors be purchased? Thanks a
lot

Why not 10 9V batteries in series?

I came across a couple of old original battery packs (full of defunct
carbon-zincs) that took the innards out of so that i can fill it with
D cells for the "A" voltage and 9v batteries for the "B" power. You
can get the 9v battery connectors at Mouser for to cents apiece by the
hundred, and 5 cents for the pair if you buy just the connector snaps
and solder your own wires. But I thought that it would be good to
have a battery pack that would take just one type of battery at a
minimum number. 6 "D" cells sounds interesting, and should give a
reasonable life. I suppose I could use 10 9v battereis for the "B"
supply and two or three 9v in parallel for the "A" but that is still a
dozen or more batteries and the "A" supply won't last long. Also a
person could use 60 + 6 "AA" cells . . . .
I know at least one person sells a dc/dc converter for Transoceanics
that takes 9 DC cells (+ 1 for the dial light) but they want 90 bucks
for it plus what ever the shipping charge is.

I know at least one person sells a dc/dc converter for Transoceanics
that takes 9 DC cells (+ 1 for the dial light) but they want 90 bucks
for it plus what ever the shipping charge is.
==========================================
A good reason to build such a converter yourself....probably for
peanuts. A 555 IC ,2 power transistors and a few passive components
Google is your friend. After all this is THE homebrew NG.

Good Luck

Frank KN6WH / GM0CSZ

I have tried this
The best converter's zaps a single 9 volt battery in 5 minutes, to much
current
You need to use ten - 9V in series.
I have even tried some Mouser VCR display converters they dont have enough
current.

-Joe

"tack" wrote in message
oups.com...
I have a few of these radios; I'm wanting to put together some battery
packs for them. Does anyone have a good schematic for a DC-DC
converter to take 9vdc to 90vdc?
I'm also going to need to make up a 4-prong connector for the battery
packs; any ideas anyone? Can the connectors be purchased? Thanks a
lot

There are quite a few designs in use.

Here's one...

http://www.ling.mq.edu.au/~robinson/...verter_4W.html