1962 fender bandmaster

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1962 fender bandmaster

Postby blainenbecky on Mon Oct 17, 2016 7:09 pm

I am new to this board but Icame across this old fender amp
I am no amp tech and do not know very much about these old fenders but I do have some experiences changing out Caps on old radios
in the past and some of them even work after I done,lol
going to try to post some pics of this old amp and what I am trying to do and some readings I get from some caps ,lets see if the pics work

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the cabinet covering is going to need some glue ,anyone know what kind of glue they used on these things?

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started with cleaning up these 2 switches

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thought is might be useful to know what kind of switches these old fenders had in them .they may be sought after someday

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one down one to go

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cap 1

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cap 2

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cap 3

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cap 4

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cap 5

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cap 6

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cap 7

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what do you guys think?should I try to power this thing up with mt Dim Bulb Limiter for a short time to see if I have working transformers or do you think the Caps are too far out of range to power it up?
Last edited by blainenbecky on Wed Oct 19, 2016 11:40 pm, edited 1 time in total.
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Re: 1962 fender bandmaster

Postby Baron Von Machinenmann on Wed Oct 19, 2016 9:12 pm

Replace them before you power up, should be evidence of dimples/bulging on the ends, not worth the risk IMHO.

Welcome aboard! :cheers:
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Re: 1962 fender bandmaster

Postby stratele52 on Wed Oct 19, 2016 10:11 pm

There is no risk to power up with a 100 watts bulb as a dim current limiter with original caps.
Check if the amp have the right fuse.
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Re: 1962 fender bandmaster

Postby blainenbecky on Thu Oct 20, 2016 1:14 pm

thanks guys
I just ordered new Caps last night
and I do have a dim bulb limiter,does anyone know what the right amp fuse is for this amp off hand ?
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Re: 1962 fender bandmaster

Postby stratele52 on Thu Oct 20, 2016 1:22 pm

blainenbecky wrote:thanks guys
I just ordered new Caps last night
and I do have a dim bulb limiter,does anyone know what the right amp fuse is for this amp off hand ?



Schematic show a 3 amps fuse

http://ampwares.com/schematics/bandmaster_6g7a.pdf
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Re: 1962 fender bandmaster

Postby Dean Jr. on Thu Oct 20, 2016 9:28 pm

Nice amp....it looks to be all-original but for that 1966 Jensen sitting in that tone ring cab. IS that a C12Q or an N. One would hope for an N....and treat it gently. That fuse should be a Slo-Blo, by the way.
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Re: 1962 fender bandmaster

Postby stratele52 on Thu Oct 20, 2016 10:15 pm

Dean Jr. wrote: That fuse should be a Slo-Blo, by the way.


Any link where you read S.B. 3 Amp fuse in 6G7a amp ?
All Fender Bandmaster schematic I look write when is Slow Blow fuse . On this this amp schematic is not write SB, this mean this amp need a Fast Blow . When is not write SB, it is alway FB

Other Bandmaster using SB fuse use a 2 amp fuse not 3 amps.
A 3 amps SB is close to a 4 amp FB.

Most of the time it is write on the back of the amp.
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Re: 1962 fender bandmaster

Postby blainenbecky on Thu Oct 20, 2016 10:31 pm

thanks for the INFO guys
my speaker number are 220606 023119 C12NA.C8220-3 MA-1466 (THAT LAST NUMBER IS HARD TO MAKE OUT) as best I can tell

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Re: 1962 fender bandmaster

Postby Dean Jr. on Thu Oct 20, 2016 11:13 pm

I stand corrected, stratele52....3amp Fast blo. Thank you.
speaker codes....
220606 023119 C12NA.C8220-3 MA-1466

that Jensen was built the 6th week of 1966....202 - Jenson, 6 - 1966, 06 - the 6th week of that year. C12NA The MA-1466 was probably stamped in the Fender factory when it was brought into inventory...the 14th week of 1966.
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Re: 1962 fender bandmaster

Postby wilson32 on Fri Oct 21, 2016 8:57 pm

Nice amp. Are those short bottle 6L6's RCA's ?
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Re: 1962 fender bandmaster

Postby Dean Jr. on Fri Oct 21, 2016 9:45 pm

Those tubes look a bit like some old Tung Sol 5881's or some 6L6WGB's, don't they? If so, one might be concerned about the voltages.
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Re: 1962 fender bandmaster

Postby blainenbecky on Fri Oct 21, 2016 11:29 pm

the tubes I pulled out of this amp are 7025-7025-12ax7-7075-????- 5881-5881
the 5881 tubes are both broken in the center pin

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Re: 1962 fender bandmaster

Postby stratele52 on Sat Oct 22, 2016 9:17 am

Center pin is only to guide you. Put a tape with a dot on the tube black base and amp chassis to how to align tube.
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Re: 1962 fender bandmaster

Postby JeffH on Sat Oct 22, 2016 10:19 pm

Looks like a nice unmolested head and cab (except for replacement speaker). It's nice to see such care taken with restoring it.
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Re: 1962 fender bandmaster

Postby Dean Jr. on Sat Oct 22, 2016 10:33 pm

That dirt /corrosion accumulation on the socket ends of the power tubes is of interest. Are the tube sockets showing some oxidation and/or corrosion? IF so, some carefully cleaning would be advised.
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