vicman

My Feedback: (10)

Dude, you need to be up here tomorrow with your speed planes!

ggeezer

Hi Zor,
I have a number of tube type Citizen-ship radios operating. To solve the HV problem, I have been successful at hacking mobile inverters (the type that plug into the cigarette lighter and provide 120VAC) into HV DC power supplies for the B batteries. These inverters often go on sale for $9.95 and when you remove the case the resulting module is small and when combined with a 9 AA cell (1000mah) battery pack, is actually smaller than the original two 67.5V batteries.
I get about 3 hours of flight time per charge with the power supply putting out 140VDC at 1.2 watts.
If anyone is interested in the details, let me know and I will write up some instructions.

Orv.

All Day Dan

My Feedback: (5)

Orv, of course we are interested. Please post the instructions. I sold a perfectly good CTX transmitter because I could not find any batteries. Dan.

Zor

ggeezer,

To thank you for the response and your very good solution to replace unavailable B batteries.

DAN REISS is also interested.

In my early days building home brew transmitters and receivers with vacuum tubes I used components from old car radios and built vibrator types power supplies operating on a car battery.
I used VR105 and VR150 to stabilize the high voltage.

Pictures have been posted a long time ago.
I can post some again here in this thread if someone wishes.

I also experimented with a dynamotor from a 19 set which I still have.
For those who wonter the 19 set was used in world war II in army tanks and operated using a dynamotor supplying 250 and 500 volts DC.

These were the good old days .

Zor