Jcm 800 2203 new build

[Mr_Tickle]

Hi there.
I am just about to start my build and am getting slightly confused as to differing info regarding connections to the EL34's.
The schematic I have shows pins 4 and 6 connected through a 1K 5 watt resistor and pin 5 going to the board via a 5.6k resistor yet looking at the Hoffman Plexi layout on the site it says pins 5 and 6 connected through the 5.6k resistor and pin 4 to the board through a 1k ressistor.
Are they both correct? If so what difference does it make?
May be silly questions but I am learning as I go and dont want to cock it up.
Cheers

[jerrydyer]

its just a preference. 6 is nothing so Doug chooses to use 6 as a connection point for the 5.6k resistor to pin 5. And he prefers his 1k 5watts on the board.... dats all.

[sluckey]

What he said. But here's a tip. Get one schematic/layout to work with and don't look at others. Stay with the one and let the other one ride. There's always more than one way to skin a cat, and you may get into trouble switching between different layouts for the same amp. But......

Hoffman's Plexi ain't the same as a JCM-800 2203.

[jerrydyer]

yep...I dont know how many bonehead mistakes ive made like that.

[Fresh_Start]

When in doubt, there's no substitute for the tube data charts:
http://www.mif.pg.gda.pl/homepages/frank/vs.html

Cheers,

Chip

[Mr_Tickle]

Thanks for the info guys.
I agree with Sluckey. I'll stick to one schematic and stop look on the web.
AND I know pin 6 doesn't do anything so WHY didnt I work that one out myself. DOH!!!!!!!
Anyway you live and learn.

I'll probably be on again soon with more questions as this sight is great with tons of knowledge on it so I better stop reading and get soldering.

Cheers again

[jerrydyer]

brain fart
one time I was tired and I sat there for 5 minutes with buss wire against my solder tip getting angry that it wasnt melting... 

[TubeGeek]

brain fart
one time I was tired and I sat there for 5 minutes with buss wire against my solder tip getting angry that it wasnt melting... 

Been there, done that too!

[Davidg]

I had to learn a lesson like that today! I have had an old Traynor YGL3 mk3 I have been tinkering with for a couple of months- tried every possible combination of tone stack values and the amp always sounded like crap-very nasally, icepick treble.Finally realized the tone controls were wired wrong and had been since I had the amp ! That was not being tired but plain old not paying attention

[Willabe]

How does it sound now?


               Brad