The Amp Garage

Very tidy!

I’d have to check the accuracy of my LTSpice EF86 models I use again. Last time I checked the curves were pretty much spot on the curves in the Philips datasheet. I hold the Ayumi models in high regard. Usually I’m not more than 5 to 10% max off when comparing sims to real life. I think the 240k an...

rdodson wrote: ↑Fri Feb 14, 2020 3:43 pm Did anyone ever divulge/figure out what the purpose of the inductor is/was?

Ron

In that position it would be a low pass filter, no?

That's TKD, not TDK, innit?

talbany wrote: ↑Tue Dec 24, 2019 11:18 am That's it!! This is my last ODS.

Until the next one...

What's the correct polarity for this position?

Smitty wrote: ↑Tue Nov 19, 2019 6:21 pm

When did the RNs and CMFs become RoHS compliant?

I'd bet good money this is the biggie.

Now, how close do you think you could get to this amp with resistors that are still being made?

martin manning wrote: ↑Wed Aug 28, 2019 4:29 am

talbany wrote: ↑Wed Aug 28, 2019 1:16 am I wonder why did Dumble use so many different plate loads?
100K-120K-180K-150K-220K-

Harmonic complexity, I think. Each of those plate loads, with its unique cathode resistor value, produces different distortion content HD2, HD3, HD4, etc.

And different gains. More Rp = more gain.

The snob in me, back in the day, would have probably scoffed at what I’m about to say, but how about if most of the “tweaking” and customization Dumble did for his clients was selecting different parts to use in each build? I’ve come to think there’s definitely something to this. Remember the comme...

Henry Heisthl did one also that was quite small and looked great. https://ampgarage.com/forum/viewtopic.php?f=5&t=4748 Another variant from Henry... RP_lator.JPG I also built one of these as well works great! :D here is the layout Henry posted way back RP_lator.JPG Small FX loop.jpg Small FX Panel....

Careful with that crowbar!

The board with the metal heat sinks on the 3 main Transistors looks like a driver board for the outputs of a solid state amp for sure! My bet now that those are out of one of Fenders SS. super reverb model amps as they sold the most from what I recall. Would the inductor be associated with the "Sty...

https://www.newark.com/prehkeytec/71206 ... dp/99K0381

https://www.newark.com/prehkeytec/71430 ... dp/99K0393

https://www.prehkeytec.com/products/din-connectors/

Serie 71206 and 71430