45 SET amp addiction

You are twisting my arm. I'm thinking there should be a nice 45 amp in my near future. Seems like something everyone should experience. Curse you. 😋

A this point, it might be worth sending a message to those folks that believe it is mostly the speakers that matter. They might be, but don't undersell the importance of the amplifier. It all matters. The amplifier and speaker are a system... and being able to accommodate these low power SET amps matters. Well, at least to a few crazies.

Loving your adventures!
 
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Fran604g

Just Call Me Junior
Public service announcement; @MrEd, @Audionut, @shoshin, @Fran604g – don’t do drugs, just stay away from this shit.



But if you do have the inkling for a taste, and think you can pull back when it goes bad, let me tell you...
:)
Last week I was telling Sharon that I might pull the Get*SET*Go apart and see what I could build from the parts. Thar's James iron in that thar amp...🤔

But I'm already so happy, and amazed, when the voices sometimes literally come out and touch me. Spooky stuff.

It's a paradox.
 

MrEd

Senior Nobody
Public service announcement; @MrEd, @Audionut, @shoshin, @Fran604g – don’t do drugs, just stay away from this shit.



But if you do have the inkling for a taste, and think you can pull back when it goes bad, let me tell you...
:)
Trouble is I have a few old mesh plates that are un tested.
Not sure if they are any good, maybe someone here has a tester for 4 pin DHTs and could check them for me.
It would be another fun project to add the list.
 

billfort

Administrator
Staff member
I have to go all-in now, so popped these in last night; RCA UX-245 globe. These always make me a little nervous - an 80 year old tube (!) with a very simple, fragile looking internal structure and something I doubt I'd find/buy again.

They warm up without drama, go real quiet with a tweak on the hum pots and quickly remind me of why in some ways, they are the best I've heard here - and also why they don't stay in this amp long-term.

I'm going to circle back through some stuff I've played recently and finally get to some vinyl - London Calling is Calling. I love these, but find I might be missing that solid bass foundation and better sense of having 'enough' power that the TJs deliver.


UX245rsz.jpg
 
I have to go all-in now, so popped these in last night; RCA UX-245 globe. These always make me a little nervous - an 80 year old tube (!) with a very simple, fragile looking internal structure and something I doubt I'd find/buy again.

They warm up without drama, go real quiet with a tweak on the hum pots and quickly remind me of why in some ways, they are the best I've heard here - and also why they don't stay in this amp long-term.

I'm going to circle back through some stuff I've played recently and finally get to some vinyl - London Calling is Calling. I love these, but find I might be missing that solid bass foundation and better sense of having 'enough' power that the TJs deliver.


View attachment 34263
I'm sure they sound wonderful. The old globes are out of reach for me. It took a long time to find really good mesh 27 tubes for my preamp.
 
I have to go all-in now, so popped these in last night; RCA UX-245 globe. These always make me a little nervous - an 80 year old tube (!) with a very simple, fragile looking internal structure and something I doubt I'd find/buy again.

They warm up without drama, go real quiet with a tweak on the hum pots and quickly remind me of why in some ways, they are the best I've heard here - and also why they don't stay in this amp long-term.

I'm going to circle back through some stuff I've played recently and finally get to some vinyl - London Calling is Calling. I love these, but find I might be missing that solid bass foundation and better sense of having 'enough' power that the TJs deliver.


View attachment 34263
That’s exactly what I hear with my globe 46 tubes vs ST. The globes have genuine magic in the midrange and treble but they just don’t have enough weight in the bass.
 
Thought I’d re-introduce myself here. Getting back into tube audio. Was at VSAC. Have built set’s with 45. Don’t have one ATM. But recently refreshed my memory when a friend built his first 45 SET. A few of us (6 due to UK covid rules at that time). Speakers were very efficient, I can’t give details of most of the drivers but they’re all supporting Lowther EX4’s I.e some are air motion but another form of super tweeter I’m ignorant about and some efficient bass helpers. This all goes on in Yorkshire UK.

Steve whose new build it was came out with a big grin and so did I. With the ST 45’s my mouth fell open in shock. How come I ignored this tube for last 20 years.

I brought my box of 45’s so we put two globes in…… Oh my!
Get globes boys and girls if you can find them!

Sadly I dropped one of my globes when I arrived home. Broken cherished glass. Ho hum.

The ST 45 is great sounding, until you try a globe, then the ST is uninspiring. But compared to any other low powered tube it holds its own.
 
After vsac a few of us thought we’d like to have UK get together. My friend from the first days I got into tube audio late ‘90s. Who happens to live 40 miles away took the challenge and organised the meetings. First one in Eggborough Power Station. An apt location! I brought a 212 amp and demonstrated how easy it is to construct an SET by building it live then playing it. Also took a resistor less capacitorless PX25 with Balloon’s (in UK a globe was traditionally called Balloon shaped.)

I’ll get back on topic. James brought his Quasar Perspex OB’s and Jonathon Noble all the way from South Africa and olde friend of mine from Ned Carlsons Tube Audio email group which had Stephie in it who I gleaned most of what I know that is worth knowing about valves. Johnathon brought a hurriedly put together ST 45 SET.

It was the best the Quasars ever sounded for me!

why have I omitted to capitalise on that sound? I have no idea why I’m sometimes so stupid!
 
Getting the chance to throw 45's into the system, thanks to a local friend. Technically not in an amp purpose built for these tubes (trying some 2A3's as well) but I can definitely understand the love for both of these tubes. Tone, tone, tone and presence.

Listening to smaller scale stuff as word on the street is that that's what this does well, and that word ain't wrong. Let's see what it does with Sabbath... (I don't think these speakers could handle Sunn O)))) or else we'd go there too).
 
Getting the chance to throw 45's into the system, thanks to a local friend. Technically not in an amp purpose built for these tubes (trying some 2A3's as well) but I can definitely understand the love for both of these tubes. Tone, tone, tone and presence.

Listening to smaller scale stuff as word on the street is that that's what this does well, and that word ain't wrong. Let's see what it does with Sabbath... (I don't think these speakers could handle Sunn O)))) or else we'd go there too).
Experimenting is just good relaxed fun. Don’t let the moaners put out you’re fire. They’ll find every doubt and dissuasion in a box of infinitesimal points scoring . Enjoy this moment!
 

adaug

Awaiting Updated Member Status.
Experimenting is just good relaxed fun. Don’t let the moaners put out you’re fire. They’ll find every doubt and dissuasion in a box of infinitesimal points scoring . Enjoy this moment!
well put! words to live by.
 
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