Antique Radio Forum for Collectors
HomeHome  RegisterRegister  FAQFAQ  SearchSearch  Log inLog in  
The Forum is Now Easier to Navigate. We now Have Catagories then the related Forums.

Share | 

 STC Bantam B-141 radio saving/conversion

Go down 

Join date : 2011-06-29

PostSubject: STC Bantam B-141 radio saving/conversion   2013-01-14, 9:49 pm

Hi folks,

I've 'saved" the above radio from landfill, but alas it's got some serious pathology..
The choke has been eaten irreparably by mice, and the two metal square cans were smashed..
Plus, the bakelite casing has cracked in two, but has been re-glued years ago.
A small, cute guitar amplifier is in order - a 12ax7 feeding the 6v6 and away we go.
Here's a service bulletin for this model:

My question (finally)..
can someone help me with the maths to calculate a resistor to replace the choke on the centre-tap of the transformer?
The choke resistance is marked 255ohms, the 6V6 voltages are 210v plate and 220v screen, but I'm getting tied up in knots trying to calculate an equivalent resistor.
I'm aware a choke and resistor are not directly interchangeable, but I think it's the best chance of trying to get it going, as the transformer is small and so redesigning the circuit like say a Fender Champ circuit might be impossible if the transformer is not up to the task..

Thx for any help, David
Back to top Go down
STC Bantam B-141 radio saving/conversion
Back to top 
Page 1 of 1
 Similar topics
» Detection Probability of Terrestrial Radio Signals by a Hostile Super-civilization (LOL)
» AFP probes official over P400-M fund conversion By Mario J. Mallari
» Kilograms to pounds conversion please
» Your life saved or saving a life?
» radio 4 extra

Permissions in this forum:You cannot reply to topics in this forum
ANTIQUE-RADIO-LAB :: Radio Repair Bench :: Radios -Tube type-
Jump to: