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Analog Squared Paper Discussion and Appreciation Thread. - Page 31

post #451 of 3473
Quote:
Originally Posted by ianmedium View Post

Just out of interest whom among us purchased the RCA's Andy found? I see he has sold out and it would be nice to compare notes between us I think.
Quote:
Originally Posted by GermanGuy View Post

Got an email from tubefix@arcor.de that all available lorenz sets were ordered during the weekend, he wondered why everybody seems suddenly to be interested in lorenz tubes. I will get contacted when he finds any lorenz df91 or dl92.
 

I've been shopping around during the weekend.

I'm not sure who took it, but could possibly it was me. Thanks for the link Andy. beerchug.gif

GermanGuy, we're looking forward to hear if they have new stock of those Lorenz. L3000.gif

 

 

Quote:
Originally Posted by ianmedium View Post

Regarding the 3S4T tube.

Just had a response from Shikada San saying it would work but seeing as that tube is the driver tube there would be an issue with less power , and looking at the numbers,quite a bit less power so I would not go with that one I think.

Ouchhh... Very well noted then. Thanks for sharing, Ian.

 
 
Quote:
Originally Posted by GermanGuy View Post

I found a nice site

http://frank.pocnet.net/

With thousands of tube data sheets and more everything can be downloaded as pdf-file, per tube and manufacturer!

 

Quote:
Originally Posted by GermanGuy View Post

A lot of vintage tube data books and info can be downloaded here:

http://www.tubebooks.org/tube_data.htm

 

GermanGuy, thanks for keep sharing these wonderful sites. popcorn.gif

post #452 of 3473
Yeah thanks German Guy, I am really enjoying reading all the new information on those sites!
post #453 of 3473

I believe I'm too late in looking around for these tubes.

Most of them (especially those links in this thread) have been bought. basshead.gif

 

Btw, I just found this on the ebay : http://www.ebay.com/itm/230984727129?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

That's the Tungsram 1T4.

Just wondering why the price is pretty high then. popcorn.gif

post #454 of 3473

Ahhh... just realize it's for charity... atsmile.gif

 

Interested anyone? 

post #455 of 3473
Though I think it wonderful it is for charity that it way to high a price!
Your not too late mate, just keep an eye on ebay most days like I do. I can let you know about certain sellers who always have stock as they are dealers.
post #456 of 3473
Quote:
Originally Posted by ianmedium View Post

Though I think it wonderful it is for charity that it way to high a price!
Your not too late mate, just keep an eye on ebay most days like I do. I can let you know about certain sellers who always have stock as they are dealers.

 

Yeah... I think it's way too high... blink.gif

 

I'm starting to stare the ebay everyday now... hahaha...

Btw, I'll be more than happy if you could share those sellers. beerchug.gif

post #457 of 3473

Just looking around for alternatives to DF91:

 

bought 3 Telefunken 1U4 - 5 Euros each - - Also DF904 should be compatible

 

? Compatibility of DF91 and DF92: ?

 

http://vintagetvandradio.myfreeforum.org/1T4_DF91_to_1L4_DF92_swap_about3460.html

 

http://www.ebay.de/sch/i.html?_odkw=tube+lorenz1l4&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0&_nkw=tube+df92&_sacat=0

 

Anyone has experience with that types ?

post #458 of 3473
post #459 of 3473
My first real disappointment in receiving tubes today. The order for the RCA's came in but neither were RCA's. Both say on the box "Sylvania" and both are from the same batch which is a good sign, I am just about to put them in the amp.

The other thing with these is that when I opened them up one is a Sylvania, the other a Ken Rad. I have not liked the Sylvania's that came as stock as the noise never left them.

I have sent a note to the seller on eBay. I know that for most applications of these tubes people do not care as they are for portable radios so he probably thought that. However, he sold them as RCA's, not only in the picture but in the description.

Now I know that they are all probably made in the same factory but these are made two years later than the ones he advertised as well.

Oh well, 42 tubes and this is the only bad experience with a seller so far. I can't even complain about the Tele's in that respect, they were what he showed.



Still, the proof is in the pudding as they say so I will give them a listen, who knows, they may end up surprising me!
Edited by ianmedium - 6/20/13 at 1:49pm
post #460 of 3473
So, the seller got back to me and wants to make things right but to be honest I am very happy with the sound of these tubes right out of the box. Just the tiniest amount of ting noise but that will go with burn in but the sound of these two tubes is excellent.

A sort of cross between the Marconi's and Phillips which is great!

So this brings me to a thought I have been having of late. It seems the tube companies frequently mix and match and basically print what ever they like on the tubes, the only thing being relevant is the tube type it seems.
What seems to be a pattern that is emerging I am finding is that batch matching is more important that the name on the tube.

Both these tubes are mil-spec, both with matching dates and batch numbers in spite of different printing on the tubes and that seems to matter as I have gone over other tubes I have and the best sounding ones are the ones with matching numbers!

Now, I am not talking about matching tubes by testing them, that is a whole different thing and to be honest not necessary as this is a SET amp where matched tubes do not matter as much. No, this is simply getting pairings from the same batch date and code.

I have taken a picture as per usual, the Sylvania is the end tube, the Ken Rad second in.

I will report back in a few days but right out of the box the sound is lovely!


Edited by ianmedium - 6/20/13 at 2:48pm
post #461 of 3473

I believe you have come to the same conclusion as the folks at Woo Audio.  They are super duper nuts about making sure all the tube that go into their amps are matched batch sets.  Good job, and good ears...

post #462 of 3473
Thanks Jeff!
That is really great to know and these new to me thoughts are making me think very differently about this whole tube thing!
post #463 of 3473
Quote:
Originally Posted by ianmedium View Post

So, the seller got back to me and wants to make things right but to be honest I am very happy with the sound of these tubes right out of the box. Just the tiniest amount of ting noise but that will go with burn in but the sound of these two tubes is excellent.

A sort of cross between the Marconi's and Phillips which is great!

So this brings me to a thought I have been having of late. It seems the tube companies frequently mix and match and basically print what ever they like on the tubes, the only thing being relevant is the tube type it seems.
No, what seems to be a pattern that is emerging I am finding is that batch matching is more important that the name on the tube.

Both these tubes are mil-spec, both with matching dates and batch numbers in spite of different printing on the tubes and that seems to matter as I have gone over other tubes I have and the best sounding ones are the ones with matching numbers!

Now, I am not talking about matching tubes by testing them, that is a whole different thing and to be honest not necessary as this is a SET amp where matched tubes does not matter as much. No, this is simply getting pairings from the same batch date and code.

I have taken a picture as per usual, the Sylvania is the end tube, the Ken Rad second in.

I will report back in a few days but right out of the box the sound is lovely!
Warning: Spoiler! (Click to show)

 


 

 

 

That is very interesting regarding batch date & code.

 

Btw, Ian, that is a fantastic photo!! Everyone (interested), please click on it, the larger version is excellent/even better. Love the glow!

post #464 of 3473
Woodcans!
That is one heck of a compliment coming from who I regard as the best photographer on Headfi! I cycle through so many of your wonderful pictures on my desktop.Thank you!
post #465 of 3473
Just thought I would show a of picture of the Boxes these tubes came in to show you the details, I find all this stuff fascinating. Both are identical, I am just showing the different sides with info on.

What is interesting is that they were accepted in Feb 1945 but as you can see there is another date on them, December 1st 1950. Not quite sure what that means, my guess is they were accepted by the military in feb 1945 but only put out in stores for use in 1950 but ended up just sitting on the shelf as they were never used, just a guess, if anyone has another idea I would love to know!


Also, from what I can find thus far the "Phila" refers to Sylvania's Altoona plant in Pennsylvania and that plant is listed in the war as making Radar and "secret" devices! cool.gif
Edited by ianmedium - 6/20/13 at 3:37pm
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