It is currently Mon Mar 16, 2020 11:05 pm

All times are UTC - 7 hours



Post new topic Reply to topic  [ 18 posts ]  Go to page 1, 2  Next
Go to page 1, 2  Next
Author Message
Post subject: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 8:38 am
Offline
Rock Star
Rock Star
User avatar

Joined: Sat Jul 03, 2010 2:18 pm
Posts: 6544
Anyone ever try one of these?

Thanks!


http://amtelectronicsusa.com/productpage12AX7WS.html


Top
Profile
Fender Play Winter Sale 2020
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 11:22 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
This is quite a claim, and hard to believe:

"... solid state replacement tubes that has the same identical characteristics, power curves, nuances, warmth, and feel of real glass vacuum tubes.....Blind tests show no difference in sound character between AMT 12AX7-WS Warm Stone tubes and top of the line vacuum tubes...."

I haven't heard of the AMT replacements, but wanted to try these just to check out the claims:

http://www.jetcityamplification.com/store/accessories/retrovalve-cocktail/#!retrovalves/ctjr

I would be interested to hear if anyone has tried any of these SS replacements.

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 11:36 am
Offline
Rock Star
Rock Star
User avatar

Joined: Sat Jul 03, 2010 2:18 pm
Posts: 6544
Mike,

Me too. The solid-state 12AX7 can't possibly have the OD characteristics of a analog 12AX7. Funny how these devices seemed to be geared toward guitar amp users. I can see them MAYBE working in hi-fi amps, where the 12AX7 is kept in its linear range, 95% of the time. My bet is the device will have a crazy "SS" crunch when pushed.

These are Russian made devices, interestingly ....


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 12:17 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
Yeah, I kind of liked the idea of getting the SS sound from the preamp, keeping the output tubes, and thought that it might be a very interesting/pleasing sound, with the benefit of the long life of SS.

If the claims are true for the AMT, this could revolutionize the amp industry. I still have my doubts about being the same as tubes in a guitar amp (as you pointed out), but I suppose that I'll have to try them for myself.

Where to get the AMT, and price? The Retrovalves are $100 for a set of three.

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 1:19 pm
Offline
Roadie
Roadie

Joined: Sun Aug 02, 2009 6:55 pm
Posts: 297
Location: Warren Mi
Those been out awhile as with jet city ones. Guess it didnt catch on too good because nobody's jumping on them. There's a new type one its boxed shaped with pins:)


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 2:08 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
30 years ago they said FET ( Field Effect Transistor ) are like tube . Where are FET today ?


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 3:08 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Wed Mar 31, 2010 12:48 am
Posts: 26417
Location: Tombstone Territory
stratele52 wrote:
30 years ago they said FET ( Field Effect Transistor ) are like tube . Where are FET today ?


+1

Technology maintains its relentless march, seemingly rendering all previous advances obsolete.

:cry:

But those pesky vacuum tubes are just too damn persistent.

:mrgreen:

As for this latest development......when something seems too good to be true, it probably is.

:wink:

Arjay

_________________
"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 4:15 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
Did we read a post like this last year ? :lol:


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 4:22 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Wed Mar 31, 2010 12:48 am
Posts: 26417
Location: Tombstone Territory
If not here, perhaps on another forum......?

Arjay

_________________
"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 7:17 pm
Offline
Rock Star
Rock Star
User avatar

Joined: Tue Mar 01, 2011 3:10 pm
Posts: 5646
Location: Gateway to the West
Didn't they have metal tubes back in the 40's/50's? And if memory serves me (it can be touch and go some days :lol: ) they could be micro phonic and wasn't that the reason they moved or used glass? Seems to me this is kind of a step back?

T2

_________________
-----------------------------------------------------------
What time is it? It's Fender Time.


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 7:18 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
stratele52 wrote:
30 years ago they said FET ( Field Effect Transistor ) are like tube . Where are FET today ?


30 years ago, I was one of those people that predicted SS would make tubes obsolete. Ummm, yeah.... :oops: Maybe I still have a shot at an accurate prediction?

Having said that, FET and in particular MOSFET, do make for some very nice SS amps. B* tube amps and Sunn SS amps, both use MOSFETs and both have very good sound. It is possible to get tube tone from SS components, but very complicated, and at a very prohibitive cost (think superconductors). The reliability of such a complex circuit would probably be a nightmare also.

I am guessing that some of these SS tube replacements might use MOSFETs. :idea:

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 8:47 pm
Offline
Rock Star
Rock Star
User avatar

Joined: Sun Sep 08, 2013 8:50 pm
Posts: 4602
Location: ˚ɷ˚
BMW2002Ti wrote:
The solid-state 12AX7 can't possibly have the OD characteristics of a analog 12AX7.

Agreed, except for your injection of the word "analog". Transistors are analog too.

You can create digital circuits (gates) with transistors, but you can do so with vacuum tubes too. And for amplification, either is used as a fully analog component.


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 9:39 pm
Offline
Rock Star
Rock Star
User avatar

Joined: Sat Jul 03, 2010 2:18 pm
Posts: 6544
arth1,

Yeah I knew that, but got lazy. I should have stated the solid-state "12AX7" harmonic and overdrive character will prolly be closer to a semi-conductor, than a vacuum tube. And these are two of the more important reasons that 12AX7 tubes are still very popular in amps.


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 10:01 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
Yep! What happens when a transistor is "over-driven"? :shock:

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: AMT ELECTRONICS 12AX7-WS SOLID STATE 12AX7 "TUBE"
Posted: Tue Feb 18, 2014 10:38 pm
Offline
Professional Musician
Professional Musician

Joined: Wed May 25, 2011 12:45 pm
Posts: 1169
shimmilou wrote:
Yep! What happens when a transistor is "over-driven"? :shock:

http://www.thatraymond.com/downloads/so ... a_v1.0.pdf

"The linearity and low high-order distortion figures of a triode tube are unquestionable but when combined with distortion produced by the output transformer the harmonic distortion pattern becomes pretty similar with transistor designs."

_________________
In my opinion Leo Fender had essentially perfected the guitar amplifier by 1964.


Last edited by mhowell on Wed Feb 19, 2014 12:36 am, edited 1 time in total.

Top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 18 posts ]  Go to page 1, 2  Next
Go to page 1, 2  Next

All times are UTC - 7 hours

Fender Play Winter Sale 2020

Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to: