SoLow Watt 12A_7

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surfsup
Posts: 1513
Joined: Mon Nov 29, 2010 12:21 am
Location: Chicagoland

Re: SoLow Watt 12A_7

Post by surfsup »

Put an inductor at the cathode bypass of the paralleled triodes on the first stage. Now, the initial idea borrowed from the excellent Manzamp schematic and none less than amazing work done by ic-racer.
However the 1mH inductor didn't made any significant difference in the sound. Then I put a 500mH one (while waiting for some other values to arrive) and I think it sounds great. Band freq. should be around 43Hz with the current cap values I am using (27.2 uF to be exact) which is well bellow both low E string of the guitar and the output transformer's freq response.


I am assuming you swapped the inductor for the 1k8, just to be clear?
Synchu
Posts: 522
Joined: Sun Mar 11, 2012 5:24 am

Re: SoLow Watt 12A_7

Post by Synchu »

Nope, it is wired in parallel.

EDIT: Amp wired with a 500mH inductor. Just noticed that the circuit diagram posted was from simulating the response with a 100mH one (which I intend to wire, once it arrives)
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