Help with identifying a Fender Output Transformer

[Jahn]

Below is the big black number in my early 60's Concert. What date was it manufactured, and is it the same as in the late 50's Bassmans? Thanks!

http://img.photobucket.com/albums/v449/jahn0603/Concert%20Amp/Concert034.jpg

[Old Tele man]

EIA = Electronics Industry Association
606 = MFGR = Woodward-Schumacher
-3- = YEAR = 1963, 1973, 1983...
29 = WEEK = 29th week (of 1963 is my guess)

3x10" Concert, 4x10" Bassman and Super Reverb amps ALL used same OT (4200:2-ohm) but different PT (due to SS-rect vs. tube rect.).

...maybe this will help: http://www.unclespot.com/FenderXFMRchart.html

[Jahn]

Very cool! So the output transformer is the same in the "family" of the Bassman/Concert/Super Reverb! Thanks again, this is definitely the sweet spot "big" amp I'm going to try to keep around for a while!:dude

[slider313]

That would not be a '63 transformer due to the lack of the 125... Fender part number. I don't think it's a '73 either where the 022... part number would be present. Could be an '83.

[Jahn]

Apparently it's a '63 because the linked page shows that 125A7A=236968=18343, pretty darn confusing!

[slider313]

I believe the conversion chart means these were interchangeable. The first series is the 125 which is the later brown,blackface and early silverface amps. The 022 codes were FMI part numbers from the early 70'. That's why I believe it's an 80's part.

[Old Tele man]

...actually, I, too, believe it's a "later" FMIC product because the P/N 018343 is the 'last' of the three replacement numbers (see table).

...but, the real answer test is, does it have (a) just one 2-ohm output, or (b) three 2/4/8-ohm outputs! Single output is "old" while "3-outputs" is "latest."

[deeval]

Below is the big black number in my early 60's Concert. What date was it manufactured, and is it the same as in the late 50's Bassmans? Thanks!

http://img.photobucket.com/albums/v449/jahn0603/Concert%20Amp/Concert034.jpg


My 6g12 concert has original output trans and its same trans as my 59 tweed bassman,#45249
and also has all yellow Astron caps.mine is not the center volume,was the earliest standard volume all the way to the right.

[Old Tele man]

...my cross-reference shows:

_45249 (2-ohm) used on 5F6 and 5F6-A Bassman and 6G12 Concert.
125A9A (2-ohm) used on AB763 Concert and AA763 Super Reverb.
022855 (2-ohm) CBS-era replacement.

018343 (2/4/8-ohm) FMIC-era 50W universal replacemant

[Jahn]

uh oh. well damn. isn't the output transformer one of those things you don't want to see replaced in an amp because it changes the character plenty? feelings of getting bamboozled are beginning to creep in...well it does sound nice tho! so this one is still USA made, and is the equivalent of other Brown era trannies, just not the Concert tranny. and if ever it blows (hopefully never) i'd replace it with some kind of Mercury repro version of the 45249 to get a sound more accurate to the original Concert, which was closer to the '59 Bassman? Or I could just do that now for $150 and whatever it costs to pop that in...but again it's not like the tone sucks. man.

[Jahn]

My panic attack is over.

FENDER OUTPUT TRANSFORMER SPECS
PART# 018343
WATTS 50
PRIMARY 4000
SEC 2 ohms (4 and 6 too, but in my Concert it's 2)
LBS 6

What this means is that this OT (original USA Fender, not cheap knockoff) is a big piece of iron appropriate for the draw of a 4X10. Actually the Concert is 40W and the OT can handle 50W, which is nice. Plus the draw is 4K so it's not going to overtax the tubes - i do love the warm cleans on this guy. I do still wonder when Fender first started making the 018343 however - it certainly looks older than something from 1983 but who knows.

Here's the kicker - the '61 PT and choke and this OT were all made by Schumacher, according to the 606 code that they all share in common. That '69 bassman OT was made by Triad. So who knows, maybe there's some kinda Brown Schumacher iron symmetry going on in this amp right now, yum. OK I'm cool now.

[deeval]

uh oh. well damn. isn't the output transformer one of those things you don't want to see replaced in an amp because it changes the character plenty? feelings of getting bamboozled are beginning to creep in...well it does sound nice tho! so this one is still USA made, and is the equivalent of other Brown era trannies, just not the Concert tranny. and if ever it blows (hopefully never) i'd replace it with some kind of Mercury repro version of the 45249 to get a sound more accurate to the original Concert, which was closer to the '59 Bassman? Or I could just do that now for $150 and whatever it costs to pop that in...but again it's not like the tone sucks. man.

Hey if it sounds good and you didnt pay full vintage price then you have a very good amp! As I stated before, My 1960 concert Power Trans went south on me,and I dropped in a Mercury Mag,trans and It didnt effect the tone,and just sounds great,But it still has the Original Output so I dont know how much the tone would be with that change.
Anyways Great amps,these Browns!

[slider313]

Hey if it sounds good and you didnt pay full vintage price then you have a very good amp! As I stated before, My 1960 concert Power Trans went south on me,and I dropped in a Mercury Mag,trans and It didnt effect the tone,and just sounds great,But it still has the Original Output so I dont know how much the tone would be with that change.
Anyways Great amps,these Browns!

Exactly. I wouldn't be overly concerned unless the amp was misrepresented as all original. The '83 output tranny will do just fine as it's the correct replacement part.