Building a Tubelab SE 45 in the UK

Alan Hope · 15th July 2011, 01:30 PM

Plan to build the SE for 45 tubes (already have efficient speakers). Have built kit SET before, but not very experienced.

Beginning by getting those parts that are difficult to source from the UK ... so ...

Got the ICXP 10M45S

Mosfets 2SK3563 on the way (although no longer made and out of stock nearly everywhere the HongKong guys have big stocks and happy to supply small quantities.

Awaiting response from Electraprint re OPTs.

Anything else tricky before I bulk order the rest of the components and the board.

kevinkr · 15th July 2011, 02:51 PM

Just make sure that the mosfets you have ordered are genuine. (I have not found HK to be a consistently reliable source for tubes or semiconductors.) George or someone else may have recommendations for alternate parts.

You might also consider sourcing transformers somewhere in the EU; Bartolucci, AE (Holland), and Sowter come to mind immediately. There are quite a few others I suspect that fellow Europeans could turn you on to - shipping iron from the USA will be expensive, probably sufficiently so to put some of the better European makes in the running.

Alan Hope · 15th July 2011, 04:57 PM

Hi Kevin,

Guess there is a risk of non-genuine parts - not sure best way to confirm they are genuine.

Got my quote - shipping 2 Electra-Prints to UK is 45usd - can probably cope with that.

Plan on buying power transformer and choke here in Scotland (Bluebell Audio). Then bulk of components from Digikey (is that what UK builders use)?

I did read some comments that the 5842 tubes were now difficult to get hold of, but currently they are certainly available. Is that likely to be a problem in future?

Alan

rknize · 15th July 2011, 06:21 PM

The 5842 is slowly fading away and the prices are shooting up. Just in the past couple of years since I build my TSE, the going eBay price is several times what I paid. I was able to get them for about $5 each in sleeves of 5 back then. There is no current production and they were never used in any guitar amp that I am aware of. If you have a line on some at a good price, I would stock up on a few sets at least. That way you can match them somewhat into pairs as well

Alan Hope · 15th July 2011, 06:49 PM

Interesting. Hmmm ... seeing as I am at an early stage, should I hunt for an alternative 45 amp design using different input tubes?

kevinkr · 15th July 2011, 07:06 PM

I use 5842 in a lot of my designs and have found them to be very long lived, I'd just get a few pairs for future use as they are still relatively available on eBay..

Steven123 · 15th July 2011, 07:57 PM

I bought A few pair of the 5842 (417a) tubes on Ebay for a decent price just be patient and something will come out. You can always buy new ones @ tubedepot website but they are expensive.

rknize · 16th July 2011, 05:45 AM

Most of the ones I have are Ratheon JAN types. I have some RCA ones from 10 years or so ago. A seller will put a bunch up and the price will drop for a while.

boywonder · 16th July 2011, 02:26 PM

My 5842's are also Raytheon JAN types, picked up on Ebay a couple of years ago for $5/ea in 5 pk sleeves.

pso · 18th July 2011, 03:59 PM

Hi Alan Hope.

Pete Millet is going to buy some IXCP10M45S for distribution to Europe and Asia , take a look at your thread '' Posted new pp power amp design'' .

15th July 2011, 01:30 PM	#1
Alan Hope diyAudio Member Join Date: Nov 2004 Location: Glasgow	Building a Tubelab SE 45 in the UK Plan to build the SE for 45 tubes (already have efficient speakers). Have built kit SET before, but not very experienced. Beginning by getting those parts that are difficult to source from the UK ... so ... Got the ICXP 10M45S Mosfets 2SK3563 on the way (although no longer made and out of stock nearly everywhere the HongKong guys have big stocks and happy to supply small quantities. Awaiting response from Electraprint re OPTs. Anything else tricky before I bulk order the rest of the components and the board. __________________ FLAC, Ethernet over Mains, SB3, GD Audio DAC 19, Tubelab SE 45, FE206eN in Scotmoose Sachikos with Fostex FT17h supertweeters 0.68uF cap.

15th July 2011, 02:51 PM	#2
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Just make sure that the mosfets you have ordered are genuine. (I have not found HK to be a consistently reliable source for tubes or semiconductors.) George or someone else may have recommendations for alternate parts. You might also consider sourcing transformers somewhere in the EU; Bartolucci, AE (Holland), and Sowter come to mind immediately. There are quite a few others I suspect that fellow Europeans could turn you on to - shipping iron from the USA will be expensive, probably sufficiently so to put some of the better European makes in the running. __________________ www.kta-hifi.net

15th July 2011, 04:57 PM	#3
Alan Hope diyAudio Member Join Date: Nov 2004 Location: Glasgow	Hi Kevin, Guess there is a risk of non-genuine parts - not sure best way to confirm they are genuine. Got my quote - shipping 2 Electra-Prints to UK is 45usd - can probably cope with that. Plan on buying power transformer and choke here in Scotland (Bluebell Audio). Then bulk of components from Digikey (is that what UK builders use)? I did read some comments that the 5842 tubes were now difficult to get hold of, but currently they are certainly available. Is that likely to be a problem in future? Alan __________________ FLAC, Ethernet over Mains, SB3, GD Audio DAC 19, Tubelab SE 45, FE206eN in Scotmoose Sachikos with Fostex FT17h supertweeters 0.68uF cap.

15th July 2011, 06:21 PM	#4
rknize diyAudio Member Join Date: Feb 2009 Location: Chicagoland	The 5842 is slowly fading away and the prices are shooting up. Just in the past couple of years since I build my TSE, the going eBay price is several times what I paid. I was able to get them for about $5 each in sleeves of 5 back then. There is no current production and they were never used in any guitar amp that I am aware of. If you have a line on some at a good price, I would stock up on a few sets at least. That way you can match them somewhat into pairs as well __________________ Russ http://www.knizefamily.net/russ/cate...ics/tubeaudio/

15th July 2011, 06:49 PM	#5
Alan Hope diyAudio Member Join Date: Nov 2004 Location: Glasgow	Interesting. Hmmm ... seeing as I am at an early stage, should I hunt for an alternative 45 amp design using different input tubes? __________________ FLAC, Ethernet over Mains, SB3, GD Audio DAC 19, Tubelab SE 45, FE206eN in Scotmoose Sachikos with Fostex FT17h supertweeters 0.68uF cap.

15th July 2011, 07:06 PM	#6
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	I use 5842 in a lot of my designs and have found them to be very long lived, I'd just get a few pairs for future use as they are still relatively available on eBay.. __________________ www.kta-hifi.net

15th July 2011, 07:57 PM	#7
Steven123 diyAudio Member Join Date: Mar 2011	I bought A few pair of the 5842 (417a) tubes on Ebay for a decent price just be patient and something will come out. You can always buy new ones @ tubedepot website but they are expensive.

16th July 2011, 05:45 AM	#8
rknize diyAudio Member Join Date: Feb 2009 Location: Chicagoland	Most of the ones I have are Ratheon JAN types. I have some RCA ones from 10 years or so ago. A seller will put a bunch up and the price will drop for a while. __________________ Russ http://www.knizefamily.net/russ/cate...ics/tubeaudio/

16th July 2011, 02:26 PM	#9
boywonder diyAudio Member Join Date: Jan 2008 Location: So.Cal.	My 5842's are also Raytheon JAN types, picked up on Ebay a couple of years ago for $5/ea in 5 pk sleeves.

18th July 2011, 03:59 PM	#10
pso diyAudio Member Join Date: May 2010 Location: Valencia	Hi Alan Hope. Pete Millet is going to buy some IXCP10M45S for distribution to Europe and Asia , take a look at your thread '' Posted new pp power amp design'' .

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