Recent content by UntilThen

S11E12 I put this to the test against 2 power tubes. These are no GEC KT88 or Tung Sol 6550 but they came close... pretty close to my amazement. With that preamble out of the way, let's look into it deeper. Valve Museum describes it as 'The S11E12 is a special quality version of the 12E1. It is...

It is easy indeed. I was standing next to Eric when he did it. Most power tubes do not use pin 6 but that doesn't mean there aren't any. I am in the process of rolling through all my power tubes and so far all have worked but I am not finish with the list yet. These are the tubes I have rolled -...

As the others have pointed out, mine are Tesla tubes and should be looking at the Tesla code list. on a different topic, yes EL11 and EL12 have the same pin outs. They use the same adapters. EL12 is the more powerful version of EL11 but I don't find their sound that similar. EL11 gain is much...

On the sockets - you take a wire and connect pins 6 and 8. So that's 2 sockets you need to do because there are 2 power sockets in the amp. When Eric tried the S11E12 without the above connection, it won't work. There's no sound. Once he connected pins 6 and 8 on the sockets, viola it sings...

This is interesting. Now I can look up what year of manufacture my Tesla 4654 are. This is CK - Oct 1955. So what the seller told me was correct. At the time of buying, there was a BA - Jan1949 pair but it didn't look so good. I bought the nicest pair with the best test results. :) Also the...

Yes autobias or cathode bias. He did talk a lot about S11E12. https://www.head-fi.org/search/69171286/?q=S11E12&t=post&c[thread]=953317&c[users]=OctavianH&o=relevance I bought STC S11E12 from Langrex direct. He charged me only GBP 19 each...

That's one dac I would like to get when it's time to replace Yggdrasil. Running quad EL5 in it must be glorious. I have been following the dac on WhatsBestForum. Folks there love to run 4654 or Tungsram OS1 in it. TRP means 'tube rollers paradise'. :beyersmile...

@VanHai you're a man of fine taste. :) Thats's metal base galore. I just heard from Eric that he got STC S11E12 singing on a standard Mini Ultimate at 200v and bias at 67mV. So this tube can be used on any Ultimate but you'll need adapters unless you have pins 6 and 8 connected which is pretty...

I bought 12 x STC S11E12 direct from Langrex at GBP 19 each. It's cheaper than buying from him via ebay. :) Biasing requirements are different from EL5. Unless your amp can drop the current, it will be too much. It's similar to EL36 requirements. Also my amp's power socket have pins 6 and 8...

Good job. :) Comparison is a lot of work and takes time. Over the last 2 days I have been listening to the EL5 and 4654 (both Philips Miniwatt) and I have come to the same conclusion. They are very similar. Any differences are due to they being in almost identical but slightly different amps...

Don't file back on the pins. I did that to one of my FDD20 and there's no way to salvage it now except to add some solder because the pins becomes too short. :) The problem is with the adapter's inner metal contact plates that contact with the tube's pins. If you look at the metal contact...

I have the ability to use 6.3v or 12.6v on the other amp Universe. Besides I don't think there are many choices with 12.6v driver tubes. I have only a handful of tubes such as FDD20, 12SN7, 12SL7, 12J5. Certainly don't see the need for 25.2v as I had in GOTL. I had only 2 such drivers back then...

Nothing wrong with EL86 but I don't feel like changing out EL5 now. I'm hugging them for dear life. The tone is so beautiful. I'm at a lost for words. However I can't resist trying EL86 again. I load up Telefunken EF86, Telefunken EL86 and Mullard GZ37 in Universe and start comparing the EL86...

It's my pride and joy now. Certainly for keeps. After 9 hours of non stop music, it's open up. TKD is showing it's true colours. It's smoother now and crystal clear. This amp will now run any tubes. The 2nd joy is making my Philips Miniwatt EL5 quiet. It's not the tubes but the adapter (one of...

Fixed the cause of the crackling tube - just one. I remove the EL5 and try to pull out all the metal contact from the socket with a small screwdriver. Reinsert the tube and viola, it's quiet now for the last 1 hour. :) Happiness is knowing that these Philips Miniwatt EL5 are good tubes. I won't...