here is what i found on hand wired point to point amps , verus machine pressed .
This was in response to a post that asked why two different amps from the same maker
of the same model sounded different. This was my response.
It is much less likely today than in the past. Today, 5% resistors and precision caps are much more common and
not as expensive as in the 50s and 60s. The amps of those eras had wide variations in parts. Look at the B+
voltage of 5 Marhall 100 watters of the 60s, and the voltage can range anywhere from the low 400 to 600 volts.
Today there is more consistancy, and whether or not you are a fan of PCBs (printed circuit boards), the fact
remains that PCB's are more consistant, have trace runs that have been optimized for being quiet on CAD
equipment, and they do not absorb moisture like tag board used in the 50s and 60s is prone to do.
A good circuit design implemented with proper mechanical design and assembly, will sound good and be reliable.
Try to listen, for the most part, and don't get too caught up in dialogue.
Marhall and Fender both made amps of wide variation. That is why the same amps of the same model and year
sound different. They did the best they could at the time, and stayed in business, which was their main concern
(and there is no problem with that).
Today you have amps such as Carr Amps ... hand wired, point to point, with all the finest components available.
They are fantastic amplifiers, frankly ... magic. Then you have amps such as Rivera and Bogner ... with mil
grade epoxy PCBs .... great design and construction, and also wonderful amps. The comes along another
thought ... Matchless ... a update of a timeless classic which exceeded the orignal in many ways, and you do not
need to disassemble the entire amp to change tubes either. The Ashdown Pacemaker series of heads ... well, if
you ever saw an original Hiwatt with its mil-spec constuction, Ashdown takes this even further, right to full British
mil-spec for aircraft. Lets not forget THD ... with circuit boards made out of the best glass layup I have ever seen
(and I used to build sailboats out of composite materials) ... his boards are four times thicker than need be ... his
etch work is so thick that a grinder is needed to cut a trace, its all teflon wire and silver solder.
Those are some of the classics of today, but unlike their brothers of the past, they will sound the same when you
pass them down to your grandkids, unlike the Fender and Marshall amps of my generation.
this site has a lot of good info on tube amps .
http://www.guitaramplifierblueprinting.com/pastinfo