ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

Field coil replacement in Gibson BR-6

8/9/2004 4:25 PM
Keith	Field coil replacement in Gibson BR-6 Howdy, I'd like to replace the old field coil speaker in my 1950-ish Gibson BR-6. The speaker is a Rola 10" and is in pretty rough shape (several tears, really wimpy sounding). My question is dooes anybody know offhand what the inductance of the coil is so I can install a choke of similar value? I did this replacement on another BR-6 for a friend several years ago and just used a resistor of the same value as the coil, with no choke. That amp just screams, and is still working fine. No increased hum was apparent. Was this OK, or should I really use a choke? BTW, I don't own an inductance meter, or I'd just measure the thing. Thanks in advance, Keith

8/9/2004 4:25 PM

Keith

Field coil replacement in Gibson BR-6

Howdy,

I'd like to replace the old field coil speaker in my 1950-ish Gibson BR-6. The speaker is a Rola 10"
and is in pretty rough shape (several tears, really wimpy sounding). My question is dooes anybody know offhand what the inductance of the coil is so I can install a choke of similar value? I did this replacement on another BR-6 for a friend several years ago and just used a resistor of the same value as the coil, with no choke. That amp just screams, and is still working fine. No increased hum was apparent. Was this OK, or should I really use a choke?

BTW, I don't own an inductance meter, or I'd just measure the thing.

Thanks in advance,

Keith

Replies:

Wild Bill There were two kinds of field coil ... -- 8/10/2004 9:56 AM
Keith Different solution -- 8/12/2004 4:30 PM