Thunderbird Club

[theFixer]

As the man said, I'll stand my ground/And I won't back down.

SVT = 'Super Valve Technology', referring to the the use of thermionic valves. They were and remain valves. A tube is something you keep toothpaste in ... or @ProgressiveDoom keeps his balls in*.

PS. I make it my business to confuse Americans, seeing as the rest of us have no idea what youse are talking about half the time, it's only fair and reasonable to return the favour.

* and I still have one shot left.

... and like another man said, "I don't wanna change the world, and I don't want the world to change me".

You're valves will work in my tube amps just fine

@ProgressiveDoom ... I love ya bro... but yer on yer own on this one! By the time Kat's done with you, it sounds like you'll be joining Michael Anthony in the very exclusive club of bass players that sing soprano!

 

[hillerup]

try it this way? Still works for me

A picture says more than words:

 

[godofthunder59]

At the moment I have neither the money nor the inclination to have the amp set up for KT88s. The reputedly wonky autobias circuit was removed by a previous owner. If KT88s are your thing, then the YBA200-2 is the obvious choice (no autobias either).

Ah no pressure, like what you like. My preference doesn't have to be yours.

 

[kat888]

Ah no pressure, like what you like. My preference doesn't have to be yours.

No of course not, but I'd be lying if I said it hadn't crossed my mind.

 

[theFixer]

It's the voice, man... As soon as I hear Geddy's voice I turn the music off.

That's how the Offspring are for me. That singer makes the entire world a horrible place to be, simply by being heard! My eyes bleed... children cry... gods forsake us... puppies and kittens spontaneously combust... it's just bad man

 

[Dr_Feelgoood212]

That's how the Offspring are for me. That singer makes the entire world a horrible place to be, simply by being heard! My eyes bleed... children cry... gods forsake us... puppies and kittens spontaneously combust... it's just bad man

Or as Bill Murray put it in Ghostbusters "... cats and dogs living together... mass hysteria!"

 

[ProgressiveDoom]

... and like another man said, "I don't wanna change the world, and I don't want the world to change me".

You're valves will work in my tube amps just fine

@ProgressiveDoom ... I love ya bro... but yer on yer own on this one! By the time Kat's done with you, it sounds like you'll be joining Michael Anthony in the very exclusive club of bass players that sing soprano!

Yeah I had it coming, could be worse I suppose. Just glad she is a kool Kat. I think Im a little too relaxed in here, Ive got a sense of humor that has yet to be unleashed in here because I realize that we are all not expecting to log in for the sake of twisted comedic relief, probably dont need any hecklers either.

 

[theFixer]

Ah no pressure, like what you like. My preference doesn't have to be yours.

... and this is the difference between the Thunderbird club, and everybody else!

 

[theFixer]

Or as Bill Murray put it in Ghostbusters "... cats and dogs living together... mass hysteria!"

eggzaklee!

 

[kat888]

The waiting is the hardest part.

 

[theFixer]

Yeah I had it coming, could be worse I suppose. Just glad she is a kool Kat. I think Im a little too relaxed in here, Ive got a sense of humor that has yet to be unleashed in here because I realize that we are all not expecting to log in for the sake of twisted comedic relief, probably dont need any hecklers either.

Nah man... don't overreact! Ya gotta unleash the beast... just teach it some manors first!

(plus... there's always PMs)

 

[theFixer]

The waiting is the hardest part.

View attachment 1574070

Just listen to yer heart... it'll tell ya what to do

 

[Gluvhand]

Honestly I didn't look at the schematic first. But would help if they had a model number because I only know of 2 bass series made by Marshall, the all tube Amps out of the 70's era (Think Lemmy), and the MB series out of the late 2000's early 2010's (years may be off but you get the point). I have an MB150 combo and it's a hybrid amp. I think they made just a head as well but I think it's a 400 Watt. Only reason I think it's a amp head is because the various Ohm settings instead of a set resistance.

Unless they made another bass amp that I'm missing and someone else knows about.

They also had these amps, Marshall Integrated Bass System. Came in 100, 200, and 400 watt. I had a 200 watt and 2 15 inch cabs. Wasn't great. Bought mine new in 1985 or 1986. The photo isn't mine.

 

[RedVee]

My electronics goes back to high school and that was a long time ago...

But here goes:
On the output stage, that is not a transformer but an induction coil. It operates the same way that the ignition coil in a car does. It offers changes in voltage and current (in this case output impedance) without electrical isolation. So, whereas the coil in a car is used to increase voltage to produce a spark at the spark plug, this one is to ensure that you have your full 100W available for loads of 4-16 ohms by matching output impedance to the speaker load.

Clever, but Begs the question of why they need the switch?

 

[JIO]

The waiting is the hardest part.

View attachment 1574070

beauty - I'd have to dress in all black like Deiter (Mike Meyers "Sprockets" character) to show off that elegant white & chrome beast!

 

[Dr_Feelgoood212]

View attachment 1574417
They also had these amps, Marshall Integrated Bass System. Came in 100, 200, and 400 watt. I had a 200 watt and 2 15 inch cabs. Wasn't great. Bought mine new in 1985 or 1986. The photo isn't mine.

I guess all those times I looked into Marshall bass amps I overlooked a lot of stuff, also most of my research happened when I was between 10 and 14 so it's easy to miss stuff when you don't know what you're looking for/at. But from the sounds of it Marshall never made a memorable bass amp except the JMP Super Bass

 

[Dr_Feelgoood212]

Clever, but Begs the question of why they need the switch?

Probably to minimize the amount of speaker output jacks and use a switch instead to match the speaker resistance

 

[RedVee]

Red - that was so three pages ago! LOL - staying on top of this thread is a full time job. Fixer found out that it works on the computer but gets iffy on mobile devices like my iPad and iPhone. Later this evening I'll breakdown and give it a try on my Mac.

Yes G, I dare say I was sleeping when the subject came up

 

[PillO]

Clever, but Begs the question of why they need the switch?

You either need a switch or several jacks as there is no automated impedance matching that I could see. A switch is probably less error prone than plugging into the correct jack. If you were to connect a 4 ohm cab to the 8 ohm output, you would likely release the magic smoke that makes things work.

 

[Gaolee]

The other way around - if you didn't flip the switch, you would get 50W on your 8 ohm load or 25W on 16 ohms

Or if it was 100W into 8 ohms, then 200W into 4 ohms until it all blew up.