What's the BEST 45 tube and where can I buy it? - diyAudio
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Old 1st November 2004, 01:46 PM   #1
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Join Date: Nov 2004
Location: Hong Kong
Default What's the BEST 45 tube and where can I buy it?

Hi!

I am new with DHT tubes, and want to make my own 45 amplifiier. I heatd so many great things about this tube. Does it really sound better than the 2A3?

Who has experiences with this tube, and what's the best place to buy it? I heard a lot of good things about the Sofia (=Fullmusic??) 45. Is there a Fullmusic official website? I only found this one: http://www.fullmusic.de but why is it in Germany? THey show mesh and solid plates, but how about the sound? Is the Emission Labs 45 a good tube as well? Where can I buy it?

What is the BEST Single Ended tranformer for this tube... Where to buy it? Sorry for the many questions. I am in search for many answers. Please reply to this post when you have some information about the 45.

Thanks!!! William Lee, Hong Kong
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Old 2nd November 2004, 03:51 AM   #2
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Dear William,

Opinions vary on the "best" tube... but the 45 does have a very strong following. I have built a number of 2A3 amps and nothing has come close to my 45 amps even though the circuit topology was similar.

Try http://www.diyhifisupply.com in Hong Kong for FullMusic or TJ 45 tubes; I am not affiliated with DIY Hi Fi. Emission Labs is also reported to be good. However, 45 tubes are often available through ebay at good prices... but "cavate emptor" (buyer beware)!

There are several great transformers for the 45 tube:

Magnequest ES-050 air gapped
Magnequest EXO-050 parafeed
Tamura F-5003 amorphous air gapped
Tribute also sell transformers for the 45 tube

Remember, you will need effecient speakers; many say at least 96 dbl but I would suggest at least 99 dbl.

Good luck with this great tube.

Seta45
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Old 2nd November 2004, 06:24 PM   #3
barossi is offline barossi  Germany
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Location: Hamburg area
Hi William, Hi Seta 45,

yes i bought the Emission Lab 45 Mesh tube from www.jacmusic.com . These tubes kicks ***! They are way better than anything i heard from NOS 45 tubes.
For this EML 45 Mesh tubes i recommend lundahl iron's.
I also bought the Lundahl from JAC at Jacmusic.com
....very fast delivering also best prices....

You would choose the Lundahl LL1663/50mA -----5K @50mA
or the Lundahl LL 1620/60mA ---- different impedances
If you have more questions about schematics feel free ....

Greetings Barossi



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Old 2nd November 2004, 06:45 PM   #4
barossi is offline barossi  Germany
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Hi William, Hi Seta 45,

yes i bought the Emission Lab 45 Mesh tube from www.jacmusic.com . These tubes kicks ***! They are way better than anything i heard from NOS 45 tubes.
For this EML 45 Mesh tubes i recommend lundahl iron's.
I also bought the Lundahl from JAC at Jacmusic.com
....very fast delivering also best prices....

You would choose the Lundahl LL1663/50mA -----5K @50mA
or the Lundahl LL 1620/60mA ---- different impedances
If you have more questions about schematics feel free ....

Greetings Barossi



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Old 2nd November 2004, 06:46 PM   #5
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Quote:
Originally posted by seta4545
Remember, you will need effecient speakers; many say at least 96 dbl but I would suggest at least 99 dbl.
A friend has a DRD 45 amp and his 95 dB speakers don't really cut it...

dave
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Old 14th November 2004, 07:35 AM   #6
barossi is offline barossi  Germany
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Hi,

here's my foto. Tungsol #45 vs. Emission Lab #45 Mesh.
Sounds very fine!

Greetings Barossi
Attached Images
File Type: jpg thumbnail.jpg (49.3 KB, 1361 views)
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Old 19th February 2017, 05:51 AM   #7
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Quote:
Originally Posted by barossi View Post
Hi,

here's my foto. Tungsol #45 vs. Emission Lab #45 Mesh.
Sounds very fine!

Greetings Barossi
The Majority of 45 tubes were made by RCA on the glass the octagon shield
Is a RCA trade mark .the ww2 St models are still available. And under $200
Their internal matching is normally within 2-3%. Inspection and QC was far better then on average.

The vt52 model runs electrically a bit higher and not a drop in replacement.
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Old 19th February 2017, 12:48 PM   #8
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Join Date: Jan 2010
Location: Southeast michigan
Quote:
Originally Posted by seta4545 View Post
Dear William,

Opinions vary on the "best" tube... but the 45 does have a very strong following. I have built a number of 2A3 amps and nothing has come close to my 45 amps even though the circuit topology was similar.

Try Your Store in Hong Kong for FullMusic or TJ 45 tubes; I am not affiliated with DIY Hi Fi. Emission Labs is also reported to be good. However, 45 tubes are often available through ebay at good prices... but "cavate emptor" (buyer beware)!

There are several great transformers for the 45 tube:

Magnequest ES-050 air gapped
Magnequest EXO-050 parafeed
Tamura F-5003 amorphous air gapped
Tribute also sell transformers for the 45 tube

Remember, you will need effecient speakers; many say at least 96 dbl but I would suggest at least 99 dbl.

Good luck with this great tube.

Seta45
Hi, my favorite tube is the 45, I too also have a pair of EML 45 mesh and by far sound better than any nos 45 that I have heard. I had different set 45 amps but the best sounding circuit to me is what I have now which is a interstage coupled 45, which uses llundahl interstage transformer and tango output transformer. I also suggest a tube that I am running in my amp now, it sounds better than ant nos 45 and a tad better than the Eml tubes. It's type 46 tube, I run them in my 45 amp with an adaptor. This tube is sweeter in the midrange and even tho it puts out less power, it sounds more powerful than the 45. I have been using the 46 tube in my amp for about a year and have not put the 45 back in my amp since then. Btw i also run Eml rectifier mesh tube, which is the best rec tube I have heard.

[IMG]Click the image to open in full size.[/IMG]

[IMG]Click the image to open in full size.[/IMG]

[IMG]Click the image to open in full size.[/IMG]
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Old 20th February 2017, 03:23 PM   #9
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I 've used a variety of 45's in both my Yamamoto and Mayer amps and the EML solid plates were the best. I haven't heard the mesh version.

For more affordable NOS I like Sylvania and RCA. Cunningham globes are also very nice, but a different sound.

If anyone has any VT52's they would part with I am looking for a pair.

I agree that you need very high efficiency speakers to use the 45. I biamp so my woofers are run off a separate amp and that works a lot better than running the 45 full range.
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