Help ID-ing Bassman Ten circuit number

[The Kirbster]

I'd like to know what model number my circuit is. It's a Bassman Ten, the model with a MID control on the Studio channel. It does have a ground switch, but also has a grounded power cord. It was blackfaced before I got it, so no idea if the grounded power cord is stock or not. It LOOKS stock, molded red plastic end.

Since mine has been modded, PT changed out for something considerably larger, it's hard to tell by just looking at a schematic-plus, I'm not so good with schematics anyway. However, for future service-ing purposes, I'd like to have a schematic on hand--if I can just figure out which one!

[ivey]

We would love to assist you.

But you screwed yourself, by not getting the facts on the item before you purchase it.

tThe changes made to your unit, appear to not be documented?

A Bass Man Ten schematic is available on the web, in fact I have one. But on which data DVD, is my problem.

Hopefully someone else can assist you. But what is your problem with the amp? Since most amps have not change that much since 1948 and on.

I believe that your amp uses EL84 tubes in PP; so what is the problem. A larger PT will not help it that much. Unless you want to add more channels and pre amps. Or turn it into a guitar amp, by adding tremolo and a type 8 reverb.

Take Care

Ivey

[ivey]

I was mistaken, I have a Bass Man 20 schematic. It may help you

[ivey]

Okay, here it is, the Bass Man 10

[ivey]

Ok. and a little research goes a long way.

They were built in the 1980's; 1982-1985.
Output about 40 to 45 watts. It may claim more.

Changing the Pt, could be done to use EL34 tubes, 7027, or even 6550's.

Cord could be replaced because of wear and tear.

I hope that helped you out.

Take Care


Ivey

[The Kirbster]

Ivey, I appreciate your efforts. I'm not really having any trouble with the amp, and as it was given to me, I wasn't too concerned about being screwed.

I just have noticed from reading this forum all the different circuits that have been sold as "Bassman" amps. I honestly just wanted to find out what model number I have. I'm not even sure a schematic of the original circuit is going to be of much use, but I thought it might help me identify which mods have been made if I ever do have trouble with it.

I know the Bassman Ten was only made from the early 70's to either late 70's or early 80's. I know there were at least two versions in that time period-those with a MID control on one channel, and those without being the older ones.

[ivey]

Kirbster:

There are some very wonderful gentlemen on this forum. That will assist you in every way possible, with your problems.

They have years of experience and knowledge, that comes with solutions. Some can even repair your amp in their sleep. By just obtaining a few bits of information from you.

As they say at All State. "You Are in good hands" here at this forum

Good luck

Take Care


Ivey

[Ronsonic]

I know the Bassman Ten was only made from the early 70's to either late 70's or early 80's. I know there were at least two versions in that time period-those with a MID control on one channel, and those without being the older ones.

The Bassman Ten was pretty much its own thing and not closely related to other amps with the Bassman name. I'm aware of three variants, the older one like mine with only three knobs in the normal channel and the ones with a mid added. The other change was the 70 Watt amp with the ultralinear output section and IIRC some plastic vents for more cooling. That was a significantly different amp.

The Fender Amp Field Guide is of course the standard reference. Don't think there's any need to worry about having the correct schematic, the BM10 is such a standard issue almost generic Fender circuit most techs wouldn't need to look at it. The biggest variation from Fender standard practice is the 32 Ohm speakers. They maintain one Fender tradition by having all speakers in parallel, but violate another by using something other than an 8R driver.

Good fun amps. Enjoy it.

[The Kirbster]

Oh, believe me, I'm DEFINITELY enjoying it! I'm workin' it every weekend, and I've stashed my Hot Rod Deluxe in my basement. It's just got a much more dimentional, complex, RICH sound to it.

It's workin' ME, too. I'm practicing more, just out of joy in the sound of it. Sadly, it also works me havin' to haul the heavy SOB around, but that's what casters and 2 wheel dollies are for!

Some might curse me for 'hacking" a vintage amp, but I put Fender kick-back legs on it, so it points at my head instead of my knees. It works well for me, so I'm not too worried about what the purists think of it.

[TheElectricMoron]

The Bassman Ten was pretty much its own thing and not closely related to other amps with the Bassman name. I'm aware of three variants, the older one like mine with only three knobs in the normal channel and the ones with a mid added. The other change was the 70 Watt amp with the ultralinear output section and IIRC some plastic vents for more cooling. That was a significantly different amp.

The Fender Amp Field Guide is of course the standard reference. Don't think there's any need to worry about having the correct schematic, the BM10 is such a standard issue almost generic Fender circuit most techs wouldn't need to look at it. The biggest variation from Fender standard practice is the 32 Ohm speakers. They maintain one Fender tradition by having all speakers in parallel, but violate another by using something other than an 8R driver.

Good fun amps. Enjoy it.

Like you say, the 70watt was very different. Different chassis, different cab (the plastic vents like a Bassman 70), UL power amp. A Bassman70 schematic will show the power amp. the UL Bassman10 schemos are around but it took me a while to find one. Like a 70watt SR, you gotta dig hahahaha hell, may be at Schematic Heaven now for all I know