The Amp Garage

It's not an RMS meter, but given the readings I got I'd say it was close enough. All you need to do is get the peak to peak voltage on your scope, then divide by 2.828. That gives you the RMS voltage. Ciao, Lou Isn’t that only valid for a sine wave; and the waveform on a screen grid may be way off ...

Littlewyan wrote: ↑Thu Aug 06, 2020 10:07 am It's not an RMS meter, but given the readings I got I'd say it was close enough.

All you need to do is get the peak to peak voltage on your scope, then divide by 2.828. That gives you the RMS voltage.

Ciao,
Lou

I did have a Mitchell Thiele-style 1x12, but it was way too bassy for my room. I played a lot of rooms with that system, and never had issues with too much bass. But, different manufacturers so.... Now, on the other hand, when I bought the first Tone Master head, I got the matching 4x12 cab with it...

Colossal wrote: ↑Mon Aug 03, 2020 4:00 pm
Lou, that's a good story. I wish I had a TC2290. Best chorusing and delay, ever.

No Doubt. But, WAY BIG AND HEAVEY! The Eventide H9 comes close enough, and it’s bunches smaller and lighter...

Ah, another “one that got away” story.... (I have lots of’em). Back in the late 80’s, I put a stereo rack rig that featured two 100W Fender Tone Master heads, a Mesa Quad Preamp, TC2290, two Moog 3-Band Parametric EQ’s among other nice stuff. My speakers for the system were a pair Mesa 1x12 Thiele c...

A few years back, Weber were selling a modern-day equivalent of the 350K with 70K tap pots. Don’t know how close it is to the real thing, but I bought one to use in a ‘61 Fender Concert style build I am working on. The tone stack sounds great to these old ears... Ciao, Lou Edited to add link: https:...

How the heck do you keep your workbench so uncluttered?

It looks like we have the same tablesaw: circa 70’s craftsman 10” belt drive... I finally gave up on the rip fence that I had to pound with my fist to get to move, and put a shopfox fence on it. Big improvement!

Have you tried calling Mesa and asking if they can supply replacement boards for these? (707) 778-6565 Mon - Thurs, 9 a.m. to 5 p.m. California time. I would advise this too. I had a DC5 in for service a whole bunch of years ago. I needed a part. I can’t remember now what it was, but I do recall th...

After discussing options with the owner, he decided to go with the Eminence Patriot Copperhead. Due to arrive tomorrow. It will be interesting to hear how they sound in this amp... thanks to all who chimed in; I appreciate your help and support.

Ciao,
Lou

Thanks for the onput, guys! Leo, the originals have a brown and brown-mustard-yellow label: https://www.angela.com/fenderspeaker108 ... 10002.aspx

Any other thoughts?

Thanks!

Hello All! I have a Hot Rod Deville 4x10 on the bench. The customer (a good friend) wanted the Fromel Supreme Mod Kit installed as well as all new pots. Done and done. Normally, I would play the amp before repairs begin, but since this is a friend’s amp, I didn’t think there would be any gotchas. Th...

Charlie Wilson wrote: ↑Mon Jul 06, 2020 4:32 am

Mr. dB wrote: ↑Fri Jul 19, 2019 3:49 am Careful with that crowbar!

Yeah he must really not like that speaker.
CW

I was thinking more like: Hmmmmm.... I wonder what..... CLANK!!!! OOOOOOOOH, he got the prybar too close to the speaker!!!!

I would guess the PT in the polytone was just big enough to power the original amp’s rated output power. I really wouldn’t expect much more output power from the new power amp. You could always put it on a dummy load and see what it can do. If I am not mistaken polytone uses mostly 4-Ohm speakers. N...

Are you sure it’a a Brute (not a Mini Brute)? What size speaker does it have?