45 tubes for Yamamoto A-08s


I am new to this type of tubes, i said to myself never buy tube amp anymore, but it was hard to resist when Yamamoto A-08s (from my old wantlist) turned up for sale at affordable price, finally. And i bought it (no more cartridges this month for sure, i am saving on new tubes). 

So many amazing reviews online, especially from people who use same speakers like my Zu Audio Druid.

Damn, why do i need another amp if i already have First Watt praised as much as the Yammy with same type of speakers. Maybe for my final comparison of the best Solid State vs. SET ... who knows.

Anyway, my unit comes with used tubes supplied originally (NOS) by the manufacturer.

I know nothing about 45 tubes and i wish to learn quickly.

The most popular NEW replacement is Emission Lab 45s ($648 for a pair in USA now, the price will be higher soon).

Maybe there are some cheaper NOS tubes available ?


Please recommend me something, especially if you have same Yamamoto A-08s amp

Thanks!


10076406 d6c5 4854 a751 76cefa9d8a70chakster
I owned that amplifier along with the Jeff Korneff 45 when I owned my horns. I tried the EML solid plates in both amplifiers and thought they gave a much more HIFI rendition. Dynamics and bass were good but just not my cup of tea for a 45 and the Yamamoto A08 is a lit up sounding 45 amplifier anyway. 
I would stick with the NOS and found the order of priority for the best in my tastes as follows:
National Union
RCA
Tungsol
GE
Sylvania
All of the above were NOS shoulder tubes. I would only purchase them from a reputable seller of tubes. On EBAY there is a chance of good tubes but you would have to make sure of return privilege and stellar feedback on tested tubes with previous sales.
Clearly a pair of RCA Globes with the flying saucer getter is to die for if you like the sweetness of the 45 however those are old and hard to find with potential high failure rate but a beautiful sound with a somewhat rolled off top end.
All is this is based on my system and to my tastes at the time so it all depends on what your after in the end and your speakers etc. It should be a clue the manufacturer included NOS with the amplifier.
I have some NOS I might consider selling if you ping me I can explain further.
@gwalt

Thanks!

I also have some left over from the previous amp (WLM Minueta), very rare military Telefunken E84L matched quad and ECC801s matched pair ... all in original boxes, purchased from The Tube Museum NYC long time ago. Some rare gold pins NOS Sylvania AT12WA Gold Brand quad and Japanese Matsushita ... since i don’t have an amp for those tubes i am willing to trade (if anyone interested).

Or maybe i should make a preamp with them ? 


@jmolsberg Thanks for the link. Spent the afternoon reading all Kevin's notes.
^ pretty good stuff 👍
I have literally sold hundreds of pairs of old stock 45s and agree, for the most part, with gwalts ratings. I prefer a more linear sound so I think Tung-Sol are best, although most of my clients prefer National Unions. I dont think that there is a bad old stock 45, but universally National Union, Tung-Sol and RCA are considered the best ST shaped  tubes. I gave up on the globes due to gas, leakage and the fact that they never seemed to travel very well. So my experience with globes mirrors that of gwalt. Contact me directly if I can be of further help. I keep a relatively low profile but have been doing this for over 20 years.
Searched the web a little bit and found some interesting topics:

HERE and THERE


Pricelist for Emission LABS tubes and stuff in Europe
Congrats on a beautiful amp. 6moons has a good write-up on the Yamamoto. The consensus is that the EML tubes push an already pretty hot amp into the lit up category.
@noromance thanks

EML for $500 extra compared to vintage NOS , big difference for a pair of tubes
Ok, it’s me again
Waiting for my National Union 45s i start thinking about RECTIFIER 80 tube too, i need only one. I have zero experience with this type of tube.

Any recommendations?

On ebay i see many of them (NOS) from the 30’s and 40’s:

Sylvania 80
Silvertone 80
Cunningham 80
National Union 80
Radiotron 80
Telefunken 1064


The mesh plate RGN 2004 Telefunken looks tempting.
For some of those European tubes the sockets must be modified like this.

I have standard 4 pin sockets.

I am like this dude 
Yes. Same article but hardly a problem to do for such a great tube.
No, they do mods only for those who’s buyin’ an amp from them.
I got my amp from Japan, i want to use what i have without any mods in the tube sockets.

So i’m looking for RECTIFIER tubes that i can just plug and use.

P.S. And new EML RECTIFIER tubes are too expensive, over $300 for a single tube that’s crazy!
I decided to try Australian made Radiotron 80 (NOS/NIB) first. Damn, it's from the 40's, definitely the oldest piece of gear in my system. 

The next step is 717A preamp tubes, something like this ?
Westen Electic is what i have now in the amp selected by Yamamoto-San, but i need NOS for backup
Has anyone tried this CA-04 preamp from Yamamoto for A-08s ?