Hello,

Please forgive me resurrecting such an ancient thread. However, information on this amplifier is criminally rare, and this thread has some of the best discussion to be found. I felt it appropriate to add further information regarding the transistors used in the EH Mike Matthews Freedom Amplifier here for this reason.

This information is based on my servicing/comparing two of these amplifiers. One of these is built using transistors with the obscure EH numbering in one section, and normal labelled parts in the other. The second amp is reversed in this regard. As such, I was able to ascertain what is what for those looking to service this amp, or try their hand at building the circuit properly.

[Schematic Label]	[Schematic Part]	[Stamped (Amp 1)]	[Stamped (Amp 2)]
Q1, Q3 NPN	2N5133	FS36999	2N5133
Q2, Q4 PNP	2N5138	FS37000	2N5138
Q5, Q8, Q9 NPN	FS37001	FS37001	2N3568
Q6, Q7, Q10 PNP	FS37003	FS37003	2N4354
Q11 PNP	2N4908	2SA627	S37005
Q12 NPN	2N3055	2SC1079	S37004

Firstly, this seems to confirm the longstanding suspicion that the "FS36999" (as also used in the early Big Muff) is in fact a 2N5133 NPN.

"FS37000" - 2N5138 PNP

On to the "FS37001" and "FS37003":

"FS37001" -  2N3568 NPN.
"FS37003" - 2N4354 PNP.

"FS37004" - 2N4908/2SA627 PNP.
"FS37005" - 2N3055/2SC1079 NPN.

Hope this information is of use to someone.