The Amp Garage

Hi Mat, I follow suit the words of the other replies, the MiniHRM sounds really great. It's awesome! I take a great interest in that amp, I intend to build the preamp section for my own. That's exactly why I'm asking. Is the overdrive generates in the preamp section only or is there a portion from t...

Thanks!

I am scaled the board drawing by a graphical software to the mentioned dimensions. I measured the trimm-pot pin distance on the scaled drawing and it is in accordance with the real distance of the pot.

Hi,

it is a grid on the on the eyelet board drawing shown.
What is the size of the grid?
I'm curious to know the size for making a drilling template.

Hi,

I'm searching for overdrive special front and rear panel drawings with dimensions.

A brilliant idea and a great realization!

Thanks!

Again, thanks for your support.
Ok, I will try it.

Kind regards
Manfred

Thank you very much for the answer!
The 5751 tube is only as NOS available and the price is three times more than a 12AX7 tube. It is possible to reduce the mu-factor of a tube by connecting a resistor in parallel between cathode und anode. Have you practical knowledge about?

Kind regards
Manfred

I'm interested in the Caroline Blues Rocket amp.
In the schematic the plate Resistor of V2a is connected to the power supply node which is marked with E in the layout the node is marked with D.
Which is the the right connection?

Have a look to this page:
http://www.geofex.com/Article_Folders/m ... tfolly.htm
Scroll down to the end of the page.
There is a power zener replacement circuit by an Power Mosfet, a zener and two resistors shown.
So you can save the power zeners.

Thanks!

The gain of the PI is about 20 to 30.
Then the input signal must be 1 to 1,5V vac-peak for clipping the output.
I'm right?

Manfred

Hi, I asked this questions on different places but I had not got a satisfy answer until now. What is the amount of the direct PI input signal level that the PI-outputs starts to clip respectively to overdrive. Marshall PI-Type 100kOhm and 82kOhm plate resistors and 470Ohm+10kOhm+4,7kOhm cathode resi...

Have a look to:

http://www.albertkreuzer.com/pics/el/ec ... ecycle.gif

Thanks to all!

cheers
manfred

Hi,

how does the 12AX7 long tailpair PI clipping sound, fine or terrible?

regards
Manfred

Hi,

I already asked this question in the SLO-Clone Forum:

Have anybody experiences with feeding in various voltage to the screen grid to sweep from the triode mode to the pentode mode?

It seems to be that no-one have experience in this there.

Have anybody tried on?