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cheesey
05-18-2008, 10:13 AM
was told it was "88 but the vertical inputs made me wonder.
were all Cdn 2204's vertical input?.

the codes are CA 629101 and LL 22506

Big White Tele
05-18-2008, 12:06 PM
Look at the white label on the bottom of the chassis. It should have the month and year in pen along with some initials. Vertical inputs could go up to 84 at least. I have one with 07 84. Im told thats odd..

bosstone
05-18-2008, 12:41 PM
My 1984 Canadian 2204's serial number starts with an S. You need to read the serial number, stamped into the back side of the chassis. The year is indicated with a letter. N=1980, P=81, Q-82, R=83, S+84, T=85, U=86, V=87. O is not used.

zuel69
05-18-2008, 02:19 PM
I had a Canadian 2203 with vertical inputs that was an '85.

Look at the white label on the bottom of the chassis. It should have the month and year in pen along with some initials. Vertical inputs could go up to 84 at least. I have one with 07 84. Im told thats odd..

bosstone
05-18-2008, 03:05 PM
My Canadian 2204 is signed as Jan 7, 1985 but has all 1984 transformers and an S (1984) serial number. It also has the vertical inputs. I have seen some American Marshalls, 2204s listed for sale as 1984 with vertical inputs too.

DEMENTED
05-18-2008, 03:28 PM
All Canadian JCM's I've seen were vertical, metal toggles and ran El34's.

mesanatic
05-18-2008, 05:13 PM
All Canadian JCM's I've seen were vertical, metal toggles and ran El34's.

+1 and they all have only 4 and 8 ohm output taps. No 16 ohm.

Griz
05-18-2008, 07:57 PM
+1 and they all have only 4 and 8 ohm output taps. No 16 ohm.

My '82 2203 (Canadian issue) does 16ohms as well.

Sounds like these vary quite a bit.

bosstone
05-18-2008, 08:08 PM
My '82 2203 (Canadian issue) does 16ohms as well.

Sounds like these vary quite a bit.

The 4 & 8 ohms output transformers have a number that starts with 783. The 4, 8 & 16 versions have a number starting with 784. What year is yours? What other variations do you know of among Canadian 2204s?

Griz
05-18-2008, 11:16 PM
The 4 & 8 ohms output transformers have a number that starts with 783. The 4, 8 & 16 versions have a number starting with 784. What year is yours? What other variations do you know of among Canadian 2204s?

I'd have to look under the hood; can't remember the tranny number offhand. Mine's a 2203 head built in '82. Not sure how much variation there is in the early '80s JCM800 amps. A friend had a pair of mid-80's 2203 heads that had the large plastic rocker switches but vertical inputs; my amp had metal switches & vertical inputs.

Don't know whether there were variations in the 2204's.

bosstone
05-18-2008, 11:47 PM
Maybe it is just the 2203 that had the 16 ohm tap. I think they your friend's 2203 with plastic rockers was probably an American head. I don't think the CSA approved the them.

I just saw a good photo of a Canadian 2204 from 1987. It is currently on the Boogie Board and for sale. It has metal toggle switches, the 4, 8 & 16 ohm taps but has horizontal inputs.

bosstone
05-19-2008, 10:54 AM
was told it was "88 but the vertical inputs made me wonder.
were all Cdn 2204's vertical input?.

the codes are CA 629101 and LL 22506

Going by what I have found out from Googleing in the past and what I have seen here, I think that Canadian 2204s switched to horizontal inputs in either 86 or 87.

I am curious to hear if any Canadian 2204s have a 16 ohm speaker output.

cheesey
05-19-2008, 01:51 PM
Going by what I have found out from Googleing in the past and what I have seen here, I think that Canadian 2204s switched to horizontal inputs in either 86 or 87.

I am curious to hear if any Canadian 2204s have a 16 ohm speaker output.

i am curious too , there are stickers on transformers 88 and one 82 , perhaps everything is not original. I played it quiet at the sellers place took it home and wound it out a bit more and a tube blew . I put in new gt el34 m's works good now but at master 8 pre dimed i lost alot of power and noticed one tube cherry red. Have to get the tubes biased they may be running hot. I took all the sovtech tubes out .
these canadian jcm 800's are mysterious. He had a cdn 2205 also but it had the plastic rocker switches.

bosstone
05-19-2008, 02:13 PM
The problems you are having with your are likely to be related to its being modified with a different output transformer. I would get it thoroughly checked out by someone who knows Marshalls very well before putting in another tube or rebiasing.

I don't think Canadian JCM's are very mysterious. The differences between them and the American market models are that, they have metal toggle switches instead of plastic rockers, internal fuses, red writing in French and English rather than black writing in just English (logical), EL34s (like they were designed to use), instead of 6550s. It seems that just the 50 watt versions had only a 4 & an 8 ohm speaker jack, which is the only thing that I am curious about but I would bet it was because of some overly conservative Canadian electrical specification, which was the reason for the choice of internal fuses and metal toggles. None of these changes, with the exception of the EL34 tubes, which many American versions are changed to, seem to make any difference in sound as long as they are the same vintage.