The Amp Garage

Dbl

Hi Martin,

I just received my kit today. Looking forward to the build and challenges ahead.

I'll have to read back through this entire thread for ideas and inspiration.

Thanks!

If you are referring to switching the two 10k resisors, the switch parallels the two resistors halving the resistance.

Yep, thats what the Imp Master does, limits the signal to the PI... you can use much lower value pot too.

May i suggest that you search this site for bootstrapped or improved bootstrapped masters. I think that they will do what you want.

The only thing to remember with using a MOSFET is it won't satuate like a 12AX7 will. The Cathode Follower stages in Marshalls provide nice asymmetrical distortion which equals second order harmonics. Thats why they still use them :). The MOSFET won't satuate at all so you'll lose that distortion. ...

TUBEDUDE wrote:+1 on the green KOA Speers, 2 or 3 watt.

Unfortunately Mouser only has very limited values of them. About six months ago I looked around and couldn't find them anywhere else for a reasonable ptice either...

Blackburn wrote:I use those exclusively now where I deem appropriate. FWIW, I have used them as plate load resistors, but typically I prefer 1w or 2w. They have very nice thick leads.

My .02uf

Yes, the 1 Watt MF1 series is a nice resistor with a body a little longer than 0.6 inch IIRC.

Now that is some funny shite. The great thing is he is now forever immortalized on the net with that stupid video. Back in the early 90s when I just started into amps, and before that kid was born, I saw Robben Ford numerous times. I can assure him that there is nothing sterile about Dumble amps, an...

Outstanding RJ. The very best to you in your future endeavors.

Lonnie was one of those session kind of guys that was everywhere, but relatively unknown to the masses in the early 80s. I, like a lot of people, was introduced to his second coming through his collaboration with SRV. Lonnie was about as solid of a player as anyone. Still like his "Oreo cookie blues...

Wow sad indeed, anyone alive in the 80s certainly had exposure to his music and creativity. A truly talented individual that left his mark on the music industry.

CC resistors handle surge voltages better than most other construction. That is why some hifi guys like them as screen resistors. We frequently use 10k 1 watt CC in the medical field as front end defib protection for that very reason. Hitting them with a 500 joule / 5000 volt pulse will vary the re...

I tried quite a bunch, also with different values ohm wise. So where Fender Blackface amps usually have a 4k7, I also tried like 10K and 2.2K. For all of those values I tried carbon comp, carbon film, metal oxide and wirewound. Using different values over the "standard" will have a much greater eff...

Phil_S wrote:New cars are an especially poor value and they make your insurance go way up.

So do teenagers...

The last 2 cars that I bought were certified Hondas off the lot. Like Phil, they were about 60% of new with a good 75% of life left.