[UntilThen]

Never say Never!

 

[mordy]

Its $20 for that aucharm fuse, and I've already guaranteed you it will sound better than the stock fuse.

I don't think you'll find a lesser fuse inside that fuse if thats what you're worried about.

I'm gonna try this fuse this time.

https://www.aliexpress.us/item/3256....0.0.191a38dah5lysU&mp=1&gatewayAdapt=glo2usa

Looked up this fuse, It says "5*20mm Acoustic rhyme blue nano oil-immersed fuse hifi audiophile audio amplifier CD decoder bile machine oil-filled fuse".
Not sure what function bile has in the fuse.

 

[jonathan c]

Looked up this fuse, It says "5*20mm Acoustic rhyme blue nano oil-immersed fuse hifi audiophile audio amplifier CD decoder bile machine oil-filled fuse".
Not sure what function bile has in the fuse.

… helps the fuse to ‘digest’ the complex waves of electricity & to give simple ‘nourishment’ to the amp? … who the hell knows? …

 

[jonathan c]

How to bide time, channel the excitement, pending the build & arrival of UltimatE …

(some of) the headphone contenders …

 

[UntilThen]

I've some great news guys regarding 6N7G, 6A6 and C3G tubes for Ultimate.

From Eric...

Hi Matt,

The 6N7 and 6A6 is twin triode but with common cathode, also the filament current is at 0.8A - If you have an adapter on 6SN7, you can use them OK.

The C3g is a pentode power tube, can be used in UltimatE with an adapter.

I noted that there are some talkings over some expensive fuses... Since they are expensive, mind you do not blow (although slow blow) them too fast & often... BEST to use the amp for sometime and make sure the amp has blown enough fuses, before you put in this expensive one... OK... : ))

Have fun & Cheers

Eric

 

[UntilThen]

Wow just wow. Never thought that I would be using 6A6 again but here it is. Had these for ages including the adapters but it was extremely noisy in GOTL.

In Ultimate, it is totally silent ! This is a Visseaux 6A6, a very nice tube ! Sound really good ! I have a pair of Visseaux and 3 National Union 6A6 - the NU all thanks to @gibosi . I had this discussion with him on the 6A6 a very long time ago about using it in GOTL.

 

[UntilThen]

Ordered. More tube rolling.

https://www.ebay.com.au/itm/154941903968

https://www.ebay.com.au/itm/202978281646

https://www.ebay.com.au/itm/201134198992

 

[UntilThen]

Just wrote to MrsXuLing about making C3G to 6V6 / EL34 adapter. Stay tune.

These bad boys are going to get some action.

 

[Nick Ryan]

Looked up this fuse, It says "5*20mm Acoustic rhyme blue nano oil-immersed fuse hifi audiophile audio amplifier CD decoder bile machine oil-filled fuse".
Not sure what function bile has in the fuse.

I was curious about their use of “Bile” in adverts, it seems to be alluding to the youngsters of today using “Sick” to describe something. So a ”Sick” machine in China is a “Bile” machine. I wouldn’t want either, I’m really happy with my McChamplifier machine sounding fantastic listening to B B King with Eric Clapton.

 

[OctavianH]

Ordered. More tube rolling.

https://www.ebay.com.au/itm/154941903968

https://www.ebay.com.au/itm/202978281646

https://www.ebay.com.au/itm/201134198992

Go for EL83 instead of EL84. Your amp seems to have operating point for output stage under 250V. Tubes are cheaper, sound the same. You can buy Telefunken EL803S and use in the same adapters and that is a spectacular tube. EL84 is much more expensive. I tried recently EL83 and EL84 and for our headphone amps sound the same.

 

[UntilThen]

Go for EL83 instead of EL84. Your amp seems to have operating point for output stage under 250V. Tubes are cheaper, sound the same. You can buy Telefunken EL803S and use in the same adapters and that is a spectacular tube. EL84 is much more expensive. I tried recently EL83 and EL84 and for our headphone amps sound the same.

Yeah problem is that the amp seems to perform better with tubes that require higher voltage like 6F6 and KT66 and EL12.

I bought the 6P14P (EL84) which is cheap.

 

[OctavianH]

Yeah problem is that the amp seems to perform better with tubes that require higher voltage like 6F6 and KT66.

From my understanding, each amplifier has a fixed operating point for each stage. This means a pair of Vplate and Iplate. Based on that, the circuitry which surrounds the tubes is adapted (bias and so on) to keep the tube at that operating point. If that is set, let's say, to 200V and 20mA (my particular case) it does not matter if you put a tube which allows 550V Vplate or 250V Vplate on it. The anode will stay around 200V. It's true that you should use a tube which has a slightly higher max anode voltage tolerance than your operating point (at startup there are some things going on) but in my opinion EL83 and EL84 should work at the same Vplate/Iplate in your amp. Of course, tubes allowing higher voltages are much more expensive, like EL84 is compared to EL83, but for us, it does not mean anything. EL83 and EL84 made from the same manufacturer will sound very close, like 6Y6 (max 200Vplate if I remember correctly) sounds compared to 6V6 (max 350Vplate). If you use 6Y6 I bet your operating point is under 200Vplate. EL83 works as a charm. Of course, I might be wrong. You can ask Eric.

 

[UntilThen]

From my understanding, each amplifier has a fixed operating point for each stage. This means a pair of Vplate and Iplate. Based on that, the circuitry which surrounds the tubes is adapted (bias and so on) to keep the tube at that operating point. If that is set, let's say, to 200V and 20mA (my particular case) it does not matter if you put a tube which allows 550V Vplate or 250V Vplate on it. The anode will stay around 200V. It's true that you should use a tube which has a slightly higher max anode voltage tolerance than your operating point (at startup there are some things going on) but in my opinion EL83 and EL84 should work at the same Vplate/Iplate in your amp. Of course, tubes allowing higher voltages are much more expensive, like EL84 is compared to EL83, but for us, it does not mean anything. EL83 and EL84 made from the same manufacturer will sound very close, like 6Y6 (max 200Vplate if I remember correctly) sounds compared to 6V6 (max 350Vplate). If you use 6Y6 I bet your operating point is under 200Vplate. EL83 works as a charm. Of course, I might be wrong. You can ask Eric.

That's a conversation I had with Eric and his reply..

Hi Matt,

I test UltimatE with 6W6 and 6F6... they can work in UltimatE all good... As for working voltages ranges ( current needed related ) from low voltage to high the range is 6Y6, 6W6, 6F6, and 6V6.

So the 6W6 and 6F6 are between 6Y6 and 6V6.... and so many 6?6 make us confusing but they all work OK in UltimatE.

Cheers

Eric

 

[UntilThen]

Again..

Hi Eric,
Just for my info, what is the B+ set to in the 6y6 amp? i.e what is the voltage set to?
Cheers
Matt

Hi Matt,
There are two AC selects from the power transformer, one is 220V and 270V... I hook it to 220V, and the 'supply power' is 228V DC, and to the plate is 216V, actually working voltage is about 200V... It can set a higher working voltage (250V) but I think it is not required, at this lower voltage, the amp delivers enough power at about 3W.
If you may have questions, please let me know.
Cheers
Eric

 

[UntilThen]

So it looks like Ultimate can consume all my tubes, including several pairs of 6N7G and 6N7 and 6A6 and C3G.

But I still have 2 pairs of Mullard EL32 coke bottle shape.... that might be a bit whimpy as a power tube.