YJM100 - 'The Ultimate Plexi' thread!

[AllenCollinsExplorer]

And you want to make sure you have it fixed whilst withint he warranty period.

Pedals in front of the amp sound so much better than the internal boost

I like the onboard boost actually. I'am not usin' it very often anyway. I really like the pure 1959SLP sound. That's the sound that I was after and I got that with the YJM (especially at low volumes). Didn't you sell yours, db? I might be wrong but I think I remember you saying that you wanna sell it.

 

[db3266]

No, I didn't sell it.

I had a Bassman Reissue 4x10 Combo LTD retro fitted with London Power Scaling, it was an experiment to see how it would compare to the YJM100.

The PS modded Bassman does sound awesome, but back to back with the YJM, the YJM wins hands down for the tone I am after.

The experiment has also illustrated what great value (for money) the YJM actually is. it costs nearly just as much to mod a Bassman with PS as it did to buy the YJM as new (and that is with buying the Bassman second hand).

I sold the Bassman yesterday, I am keeping the YJM (unless Marshall release a JTM45 with EPA).

 

[db3266]

Has anyone replaced the pre-amp tubes in their YJM and has anyone replaced the power tubes with KT66's? If so, which did you use?

 

[AllenCollinsExplorer]

No, I didn't sell it.

I had a Bassman Reissue 4x10 Combo LTD retro fitted with London Power Scaling, it was an experiment to see how it would compare to the YJM100.

The PS modded Bassman does sound awesome, but back to back with the YJM, the YJM wins hands down for the tone I am after.

The experiment has also illustrated what great value (for money) the YJM actually is. it costs nearly just as much to mod a Bassman with PS as it did to buy the YJM as new (and that is with buying the Bassman second hand).

I sold the Bassman yesterday, I am keeping the YJM (unless Marshall release a JTM45 with EPA).

Good choice! Can't beat a 1959 Super Lead!!

 

[db3266]

Has anyone replaced the pre-amp tubes in their YJM and has anyone replaced the power tubes with KT66's? If so, which did you use?

Also, what brand of tubes are stock in the YJM?

 

[Redstone]

Has anyone replaced the pre-amp tubes in their YJM and has anyone replaced the power tubes with KT66's? If so, which did you use?

I had a Tung-Sol ECC803s in V1 in my YJM for a while. It gave up after about 7 months. The stock tubes have held up well so far. The stock tubes are just Marshall 12AX7/ECC83. I'm not sure if Marshall make them themselves or if they have them made in bulk by some factory. I'd say try asking in the Preamp tubes thread, one of them will probably know. As for putting KT66's in the amp, I'd imagine they would make it sound a little closer to the JTM. I think the JTM used 5881's, but I don't know if they are compatible with the YJM, again probably a question for the experts in the power tube thread.

 

[John 14:6]

I had a Tung-Sol ECC803s in V1 in my YJM for a while. It gave up after about 7 months. The stock tubes have held up well so far. The stock tubes are just Marshall 12AX7/ECC83. I'm not sure if Marshall make them themselves or if they have them made in bulk by some factory. I'd say try asking in the Preamp tubes thread, one of them will probably know. As for putting KT66's in the amp, I'd imagine they would make it sound a little closer to the JTM. I think the JTM used 5881's, but I don't know if they are compatible with the YJM, again probably a question for the experts in the power tube thread.

The YJM100's come loaded with SED Winged C EL34's which have bee re-labeled by Marshall. The red labeled 12ax7 under the can in V1 is a re-labeled JJ, The white labeled 12ax7's are all re-labeled Shuguangs.

 

[John 14:6]

Yngwie is on the cover of Guitar Player magazine this month. He talks about his YJM100 some and mentioned that he recorded his last record with it.

[ame]http://www.youtube.com/watch?v=K2NyYKQcpI0[/ame]

Yngwie used the YJM100 on the Relentless record also.

[ame]http://www.youtube.com/watch?v=KzxgJeB3_ww[/ame]

 

[db3266]

The YJM100's come loaded with SED Winged C EL34's which have bee re-labeled by Marshall. The red labeled 12ax7 under the can in V1 is a re-labeled JJ, The white labeled 12ax7's are all re-labeled Shuguangs.

I think I will change one thing at a time and swap out the Power Tubes to KT66's and then go from there.

 

[AllenCollinsExplorer]

Yngwie is on the cover of Guitar Player magazine this month. He talks about his YJM100 some and mentioned that he recorded his last record with it.

Yngwie Malmsteen - Spellbound - YouTube

Yngwie used the YJM100 on the Relentless record also.

Yngwie Malmsteen - Knight of the Vasa Order - YouTube

I would love to read that! Can you post that article somewhere? It would mean a lot!

 

[Redstone]

Well it seems that the boost is the only thing giving trouble. The gate, reverb and everything else is fine. I haven't tested the FX loop, but I'm sure its fine. So Its just the boost and running a distortion pedal into the front. I wonder what it is. I still have a hunch it is just the tubes, but when I tried the tubes from the JCM1, it still had the same issue. I guess I'll reluctantly send it off to get fixed

 

[crossroadsnyc]

How often do you guys re-bias your YJM's?

 

[Redstone]

Normally every month or two months. Just kinda randomly. I've done it like 3 times this week in hopes of fixing mine

 

[crossroadsnyc]

Normally every month or two months. Just kinda randomly. I've done it like 3 times this week in hopes of fixing mine

I hadn't done it since I bought it last year

 

[marshallmellowed]

Normally every month or two months. Just kinda randomly. I've done it like 3 times this week in hopes of fixing mine

What about jumpering, does the amp sound bad with the boost engaged, both jumpered and not jumpered straight into Input 1?

 

[Redstone]

What about jumpering, does the amp sound bad with the boost engaged, both jumpered and not jumpered straight into Input 1?

Hmm, I've been using just channel 1 lately, I'll try it jumpered tomorrow and see what happens. Hopefully it will be fine, but even with the boost gain set at 9 o clock and the boost volume at 2 0 clock on just channel one, it sounds funny. Nothing like it did before when I used both channels. I'll mess around with it in the morning and see what happens.

 

[John 14:6]

Anyone looking for a YJM100 brand new in a sealed box? Here is one on ebay.

Marshall YJM 100 Guitar AMP Yngwie Malmsteen NEW IN BOX | eBay

 

[John 14:6]

I would love to read that! Can you post that article somewhere? It would mean a lot!

Sorry, but it is in a magazine so I am not sure how to post it. I could scan it I guess and make a PDF, but I think that would be kind of hard to read. Check out Guitar Player magazine on line.

 

[db3266]

Hmm, I've been using just channel 1 lately, I'll try it jumpered tomorrow and see what happens. Hopefully it will be fine, but even with the boost gain set at 9 o clock and the boost volume at 2 0 clock on just channel one, it sounds funny. Nothing like it did before when I used both channels. I'll mess around with it in the morning and see what happens.

Could it be a power tube?

 

[Redstone]

Could it be a power tube?

Its possible, but none of the indicator lights are on.