[leftside]

This is far more representative of what *I* like to see, especially when buying expensive tubes:

1) Tester model used (this one a TV-7)
2) Calibration evidence shown. If Dan Nelson worked on it, it's good...he's one of the best in the biz with TV-7's (at least in the USA)
3) Actual test readings shown
4) Tester reference values shown, either NOS value or "minimum good" value. Some testers use 'average' NOS values for their data charts, and some use minimum good values, which is typically 60% - 65% of the average NOS value. Either one is fine, as long as it's shown!

If that info isn't provided, then I'm (personally) not going to pay big bucks for a tube. If I can get an expensive tube for really cheap then I might take the gamble, but these are not going for cheap.


https://www.ebay.co.uk/itm/254978258950?_trkparms=aid=1110006&algo=HOMESPLICE.SIM&ao=1&asc=20200818143230&meid=fb74aff7bfe04e3ba7142ab8a517740f&pid=101224&rk=1&rkt=5&sd=402758915971&itm=254978258950&pmt=0&noa=1&pg=2047675&algv=DefaultOrganic&_trksid=p2047675.c101224.m-1

I was watching that auction. Looks like a few people noticed the clear top and bottom getters - same as most WE 421A. This type of construction seems to be very rare now.

 

[HTSkywalker]

And speaking of interesting combinations with great sonics in the Glenn:

GEC U18/20, four Tung-Sol 6BX7 and a pair of 90 year-old Arcturus #27. Looks great and sounds great.

Interesting Christmas tree you got there

 

[tubebuyer2020]

Interesting Christmas tree you got there

Arcturus blue tubes look amazing. Some violet Marelli tubes could have been a worthy addition to that ensemble, but they are likely impossible to find...

 

[HTSkywalker]

Arcturus blue tubes look amazing. Some violet Marelli tubes could have been a worthy addition to that ensemble, but they are likely impossible to find...

Have a couple of PSVANE Blue tubes which looks amazing glowing in the dark

 

[Dogmatrix]

Bit quiet down here for a while so

Tube Porn

 

[HTSkywalker]

Bit quiet down here for a while so

Tube Porn

Where are you using those pairs ?

 

[Dogmatrix]

Where are you using those pairs ?

Brand new McChanson pEart amp coming next week

https://www.mcchanson.com

 

[HTSkywalker]

Brand new McChanson pEart amp coming next week

https://www.mcchanson.com

See you are in for a treat

 

[tintinsnowydog]

Bit quiet down here for a while so

Tube Porn

Great pics and tubes! Didn't even know about the CV8614, are they direct equivalents of 6080?

 

[HPAholic]

WE 5998 / 421a from 1951 through 1955 ...

First Source: Oct. 03, 1951 on the Electron Tube Registration List and this was the RMA/EIA code for the WE 421A. So the tube with date code 152 might be the 1st ever run for the WE 5998 / 421a.

 

[Ripper2860]

Sweet. My one and only 421A has a 152 date code.

 

[CaptainFantastic]

Nice seeing all the tube pictures over the past couple of days.

I finally got the GEC 6AS7G I wanted, and just in time to enjoy with an amazing BHC built by a fellow Head-Fier (more about this in the Crack thread when I have time to do it justice properly). They came as a pair, but there is a clear difference in size. I haven't A/B-ed much, but I swear they sound better than great, I don't think I'm just telling myself that. Maybe it's the amp, because it also sounds great with the 5998, 421A or 6520.

 

[HTSkywalker]

Nice seeing all the tube pictures over the past couple of days.

I finally got the GEC 6AS7G I wanted, and just in time to enjoy with an amazing BHC built by a fellow Head-Fier (more about this in the Crack thread when I have time to do it justice properly). They came as a pair, but there is a clear difference in size. I haven't A/B-ed much, but I swear they sound better than great, I don't think I'm just telling myself that. Maybe it's the amp, because it also sounds great with the 5998, 421A or 6520.

Looks beautiful and shiny too

 

[HTSkywalker]

Which cans you tried ?

 

[CaptainFantastic]

Which cans you tried ?

HD-600, HD-650 and ZMF Aeolus. I prefer the 600 and the Aeolus.