[leftside]

You're living dangerously. I just play golf and get @bcowen to drive my golf cart without it going into the lake. That's excitement.

Is this motorbike or bicycle? I mean the rugged kind. I was into those at one time. These days I just do cross country free fall skiing.

Downhill mountain biking. From today:

Here’s those EL12 Spez with adapters:

 

[UntilThen]

Brilliant idea @mordy. That should work but now with socket savers it’s easy to pull out.

Thanks Leftside for both pictures they look lovely. I’ve a colleague who loves mountain biking. Some days he would come to work with his arm in a sling or leg in a cast. Then he would be back at it again. Might as well be adventurous. I’ve seen those sockets before and they don’t look too bad.

What I didn’t share or I may have, about my GOTL 5998 boost switch is this - on several occasions with 5998 in it and the boost switch on - after 30 mins or so, the amp starts to shudder. If I prolong it, it starts to vibrate. I can’t see that as a great experience for music or 5998.

 

[A2029]

My variant will likely operate the EL34 at higher voltages. It's not clear to me at the moment whether or not the KT150 and EL34 are actually sharing a plate voltage or not, but if they are then the EL34 is going to be pushed hard in this design because I wanted the bias points to favor the KT150 which is capable of handling more than the EL34 is.

Both the KT150 and the EL34 run off of ~475V in the variant of your amp. Bias current for the KT150 is close to double that of the EL34. Bias current for the EL34 can be set to preference based on percent of max tube dissipation. The higher the percent of max dissipation, the less distortion and more power can be gotten out of the EL34, but at the cost of shorter tube life. I like the range of 70-85% for class A biased power tubes; that often gives a good balance between tube life, and still using the tube to its potential

 

[leftside]

How about these big tubes @UntilThen? That's a Cossor 53KU at the front, which is a pretty big tube, but the ones at the back are much bigger. Compare to the size of the EL12.

 

[UntilThen]

How about these big tubes @UntilThen? That's a Cossor 53KU at the front, which is a pretty big tube. Compare to the size of the EL12.

Are we comparing size? Those aren't EL12 are they? Your previous picture yes but not these ones in the last pic.

While we're are talking 5v rectifiers, I have the same Cossor 53ku and 2 x Mullard GZ32. They are in the Woo Audio Wa22 which I'll be turning on in a tick. Have you heard your Wa22 with 3 rectifiers running? It's da BEST.

P/S anyone trying to emulate me and not knowing I'm joking with a straight face, do so at your own peril !



Also I'll be buying these back from @paramesh in 3 months time. Such a buddy from India. One day I'm sample your chicken biryani.
The GEC U52 is 3rd from right. The rest you know. They were once my jewels of the Nile.


Btw Leftside, nice pictures and lovely glow. You have your Lampizator but I'll stick with Yggdrasil. You realise the 'O' is missing in Lampizator?

 

[LoryWiv]

@leftside, thank you so much! His KT88 price seems reasonable if they are in good condition, may go for it myself!

Thanks headfi...went for it! This pair of KT88's is most I've EVER spent on tubes, but as @UntilThen notes comparatively they are fairly priced. One of these days instead of Elise with adapters maybe I'll hit up one of you custom builders and see what this "king of power tubes" can do in it's native habitat. For now I need to rest my wallet and enjoy the music.

@leftside I went for pair # 2 here Any idea what year they were made?

 

[UntilThen]

@LoryWiv ampandsound Mogwai Se uses KT88 amongst other tubes like EL34. Friend of mine has it and loves it. You can however get Mischa to custom build you one. KT88 has more bite while EL34 is smoother. General impressions going with my previous Primaluna Dialogue Premium HP running on 8 x KT88 and also after hearing Auris Nirvana running 2 x EL34.

 

[leftside]

Are we comparing size? Those aren't EL12 are they?

Yet another EL tube. This time EL51.

 

[leftside]

Thanks headfi...went for it! This pair of KT88's is most I've EVER spent on tubes, but as @UntilThen notes comparatively they are fairly priced. One of these days instead of Elise with adapters maybe I'll hit up one of you custom builders and see what this "king of power tubes" can do in it's native habitat. For now I need to rest my wallet and enjoy the music.

@leftside I went for pair # 2 here Any idea what year they were made?

1959 and 1960. Very rare. Check out how many turn up on eBay with just the single top getter. Not very often... Between us we have (or will have) every year the version with the single getter were made

 

[bcowen]

Are we comparing size? Those aren't EL12 are they? Your previous picture yes but not these ones in the last pic.

While we're are talking 5v rectifiers, I have the same Cossor 53ku and 2 x Mullard GZ32. They are in the Woo Audio Wa22 which I'll be turning on in a tick. Have you heard your Wa22 with 3 rectifiers running? It's da BEST.

P/S anyone trying to emulate me and not knowing I'm joking with a straight face, do so at your own peril !



Also I'll be buying these back from @paramesh in 3 months time. Such a buddy from India. One day I'm sample your chicken biryani.
The GEC U52 is 3rd from right. The rest you know. They were once my jewels of the Nile.


Btw Leftside, nice pictures and lovely glow. You have your Lampizator but I'll stick with Yggdrasil. You realise the 'O' is missing in Lampizator?

I can't afford 53KU's and forced to slum with these CV378's. Some play golf, some can only drive the cart.

 

[mordy]

With the right attitude you can be very happy driving the cart....

 

[bcowen]

With the right attitude you can be very happy driving the cart....

LOL! I'm perfectly happy driving the cart....much closer to the beer.

 

[Zachik]

I went for pair # 2 here

If you do not like them in your amp - I will be happy to buy them from you

 

[UntilThen]

I can't afford 53KU's and forced to slum with these CV378's. Some play golf, some can only drive the cart.

With the right attitude you can be very happy driving the cart....

LOL! I'm perfectly happy driving the cart....much closer to the beer.

Probably the reason I come on head-fi. The jokes are legendary. Who needs rectifiers. I'm hitting the golf course in 2 weeks time when I get back to Canberra.

 

[bcowen]

Probably the reason I come on head-fi. The jokes are legendary. Who needs rectifiers. I'm hitting the golf course in 2 weeks time when I get back to Canberra.

LOL! I'll be ready. Just could you please maybe think about possibly selecting a golf course without lakes? I know, I know, a lot to ask, but it's me.

PS: Canberra's not on Guam, is it?