[mattrudy80]

Other markings I found: Thanks gibosi!

 

[mattrudy80]

Other markings I found: Thanks gibosi!

2nd marking says E42.

 

[gibosi]

E42 doesn't seem to correspond to a Mullard production code....

So I have no idea what factory manufactured these tubes....

 

[Oskari]

Could be BEL, India. They seem to have made the type and sometimes used nonstandard codes.

 

[mattrudy80]

Could be BEL, India. They seem to have made the type and sometimes used nonstandard codes.

Thanks. I'll see if I can find any that are similar. The closest I have found so far that physically look similar with the tab bent up towards the getter are Sylvanias.

 

[mordy]

Thanks. I'll see if I can find any that are similar. The closest I have found so far that physically look similar with the tab bent up towards the getter are Sylvanias.

Hi m80,
Try Google images - type in the tube designation and scroll through the pictures; you may find what you are looking for.
I had a different Channel Master tube that said Japan, and I finally found a NEC tube that was identical so I found out who made it.

 

[Oskari]

Thanks. I'll see if I can find any that are similar. The closest I have found so far that physically look similar with the tab bent up towards the getter are Sylvanias.

BELs on ebay:

• https://www.ebay.ie/itm/True-NOS-NI...-6AM6-EF91-Silver-Plate-Tube-100/152793008598
• https://www.ebay.ie/itm/True-NOS-NI...nics-India-CV138-6AM6-EF91-Tubes/152792995962
• https://www.ebay.ie/itm/True-NOS-NI...nics-India-CV138-6AM6-EF91-Tubes/152793012824

 

[mattrudy80]

New set in today! Can't wait to give em a try.

 

[mattrudy80]

New set in today! Can't wait to give em a try.

Amazing how Tung Sol JAN-6AJ5 from '44 sound so much better than Tung Sol JTL-6AJ5 form '56.

 

[mattrudy80]

Anyone have any experience with National Union 6AG5's? I found an old pair that look new at a surplus store and didn't expect much, wasn't even sure if they worked. Thus far in my tube rolling journey these are by far the most relaxed sounding, great for male vocals such as Ray lamontagne and seem to be a good all arounder.

 

[mattrudy80]

Something I cooked up today. 1-7, 2-7, and 6-7 pin strapping socket saver. Number two is in the hopper. I'll give 'em a proper test later tonight.

 

[sghound]

does anybody know what the difference is between v2 and v3 of the mk2 circuit board?

 

[xenithon]

Quick question - has anyone used the 6SN7 (or similar) tubes in place of the 6H30P in the MkVIII / Mk8 and, if so, which adapters did you use?

 

[Scutey]

Don't know about the mk8 but you can in the mkiii, you need 6sn7 to ecc88 adapters, here's a couple pics.

 

[bjj51]

Would the ld3 work with sensitive headphones like the fostex x-00 or would I have to get an ss amp?