Choke Tweed Pro and Bandmaster

[buickwilson]

I know the super, bandmaster and Pro are very close circuits. Does anyone know if the choke from a 57 Pro would work in a 59 bandmaster?

[Trout]

I know the super, bandmaster and Pro are very close circuits. Does anyone know if the choke from a 57 Pro would work in a 59 bandmaster?


Not sure if this will help you, But I just happen to have an old Bandmaster 5E7 on the bench for repairs, This thing got toasted big time.

Anyway, I ordered a choke to replace the charcoaled unit from allied electronics,
http://www.alliedelec.com/Search/ProductDetail.asp?SKU=967-1006&SEARCH=&MPN=C%2D14X&DESC=C%2D14X&R=967%2D1006&sid=4681A880281FE17F

Its a Triad 6H; Smoothing Filter Choke; 150Ohms; 200mADC;

I am not 100% certain the holes will match perfectly, but the specs for Current handling, Ohms, and Henries are acceptable. And, at $16.00 they will not break the bank.

Trout

[jay42]

In most or all of those E designs, the choke passes all the current in the B+ line, so it has to be capable of 150 to 200mA. A '59 only needs to be rated at 50 or 60mA, so you can go forward with a '57 choke, but not backwards with an F '59. hth

[Trout]

In most or all of those E designs, the choke passes all the current in the B+ line, so it has to be capable of 150 to 200mA. A '59 only needs to be rated at 50 or 60mA, so you can go forward with a '57 choke, but not backwards with an F '59. hth

Isnt a 59 Bandmaster an "E" series?

I think both the 57 Pro and the 59 Bandmaster are Both "E" series?

http://www.ampwares.com/ffg/bandmaster_narrow.html


http://www.ampwares.com/ffg/pro_narrow.html
Trout

[jay42]

Ah...so Fender didn't F with all their tweed amps... :jo

Sorry, had to be said.

[Trout]

Ah...so Fender didn't F with all their tweed amps... :jo

Sorry, had to be said.

Yeah LOL, those darn things are confusing as hell sometimes. The one I have here is a 58, had me scratching my head for a bit also. The guy had somebody mod it for adjustable bias, Had he understood how to bias the amp correctly, It might have even not needed further repair. The previous guys work was done ok, but his information was far from correct.

Now he is getting a new production/reproduction PT and Choke instead of the original due to his not wanting to wait for originals to be located.

Trout

[TheAmpNerd]

I know the super, bandmaster and Pro are very close circuits. Does anyone know if the choke from a 57 Pro would work in a 59 bandmaster?

All pro thru pro reverbs use:
5E5-A - AA270 = 125C1A chokes.

All bandmasters use:
5E7- AA270 = 125C1A chokes.

125C1A = 022699

Yes they use the same choke.

Buy it from Mercury Magnetics,
know that it will fit just fine.

[Trout]

All pro thru pro reverbs use:

Buy it from Mercury Magnetics,
know that it will fit just fine.


Ummm Mercury Mags are $30.00, Triads are 16.00 and Triad has been making them since before the Fender era. IMO, MM is more hype than fact. There is nothing in a MM choke worth double price.
But hey, I guess we all have our favorites.
Trout

[buickwilson]

As usual you guys on the TGP are the best..

Thx for your info..

[TheAmpNerd]

Ummm Mercury Mags are $30.00, Triads are 16.00 and Triad has been making them since before the Fender era. IMO, MM is more hype than fact. There is nothing in a MM choke worth double price.
But hey, I guess we all have our favorites.
Trout

I thought you had to drill to get it to fit?

For me and a 59 Bandmaster...
I'd rather pay the extra money
to keep from drilling holes.

Measure and punch,
Add machine oil and drill.

Make sure the particles don't go somewhere they shouldn't...

Damn, that didn't just fit right...how about another hole over here...

Nuts, now the chassis won't slide all the way into the cabinet....

...but then, buying a high quality choke that is known to fit...

you are quite right trot...we all have our favorites...but then, that is just me.

[foghorn leghorn]

I'm preparing to build a 5E7 modified for harp. I ordered the "tweed" 200 mA choke from Ted Weber, 3 9/16 mounting centers, 5 to 8 Henries, 125 ohms, $20.00. This is designed for choke supply to plates and screens, hence the 200 mA rating. This is the correct spec and mounting centers for the 5E7. (I ordered the 5E7 chassis too).

The 125C1A/022699 that Antique Electronics sells is rated 90 mA, and is smaller, on 2 7/8 centers. This is correct for the brown and BF that use the choke only for the screen supply.

Paradoxically, all the lists I have seen DO show that the 125C1A/022699 choke is used in the narrow panel tweeds all thru the brown and blackface models, just as AmpNerd says. This would only work in all those if it were in fact the tweed 200 mA one. I don't believe Leo would have wasted that kind of money on all the brown and BF amps!

So, did Fender just change the specs of the 125C1A between tweeds and browns, but did not change the part number, or are all the lists wrong? Can anyone shed any light on this?

I have to conclude that both the tweed 5E5-A Pro and the 5E7 Bandmaster use the same, larger 200 mA choke, since the power ends both use choke fed plates, regardless of year of manufacture, and neither were "F" 'd with (made with a 5F designation).

[Trout]

So, did Fender just change the specs of the 125C1A between tweeds and browns, but did not change the part number, or are all the lists wrong? Can anyone shed any light on this?

I have to conclude that both the tweed 5E5-A Pro and the 5E7 Bandmaster use the same, larger 200 mA choke, since the power ends both use choke fed plates, regardless of year of manufacture, and neither were "F" 'd with (made with a 5F designation).

I am thinking the same thing, I do not see how the lesser choke could possibly hold up in the Tweed "E"s

I felt 200ma was pretty much a minimum spec but tolerable.
I see at the Weber site he actually has 2 different chokes made by
" Mercury" for the 2 different amps also, Wow, Cheaper than the Mercuries website even!

Bets are the Tone Clone FC-Band (Blonde, Brown, Blackface, Silverface) and The FC-Tband (Tweed)are indeed different parts.

Trout