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post #1261 of 3704

lorenz df96 - tung-sol ken rad dl92 / 3s4 mil spec

 

picture of the dream team please  tongue.gif

post #1262 of 3704

as already posted some pages earlier:

 

 

post #1263 of 3704

booth hard to find indeed ! :-((

 

tung-sol ken rad dl92:  Is "Tung-sol"  the brand ?  If So, then what means "Ken Rad" ?


Edited by bmichels - 7/26/13 at 2:11pm
post #1264 of 3704
So funny GG, I am currently really enjoying the Mil-spec Sylvania 3S4's with the Mazda 1T4's and am just about to change over to the Phillips 3S4's.

Your description of the Lorez/Ken Rad's is pretty much what I experienced with the Lorenz/Sylvania's. That is one of my favourite combinations so far.

Though I have to say these Mazda's are something else! So quiet and now I have a number of hours on them incredible at detail retrieval, best so far and that includes the Siemens and Lorenz which have been my top detail retrieval tubes.

The ability of these Mazda's to dig deep within the sonic is rather wonderful and yet they are not analytical at all, just so creamy and deep. Bass is excellent as well!
post #1265 of 3704

replacements for dl92 tubes:

 

i did some research to find alternatives for the dl92 tubes.

 

the first is the 3S4T

 

http://www.radiomuseum.org/tubes/tube_3s4t.html

 

(some time ago ianmedium posted also this tube type but no recommendation), but i think it's worth a look because it needs only half or quarter of the power for the heater. bad luck this tube is rare as gold nuggets with diamonds inside.

 

the second is the 1L33 / EP201 (i am relatively to really sure)

 

http://www.radiomuseum.org/tubes/tube_1l33.html

 

it needs only half the power for the heater compared to the dl92 and is available, at least 6 pieces left after i bought four of them already here:

 

http://www.ebay.de/itm/1L33-Vintage-NOS-TESLA-TUBE-EP201?item=251130442635&ih=015&category=64627&cmd=ViewItem

 

power consumption (heater, current):

 

df91: 50 mA

df904: 50 mA

df96: 25 mA

 

dl92: 100 mA

1l33 : 50 mA

3s4t : 50 mA / 25 mA (with the tu-05 50 mA)

 

it is obvious but also a nice option that using  df96 / 1L33 tubes will result in half the power consumption for the heaters, so possibly nearly double the run time of the amp.

 

will post some results after having received the 1l33 tubes.

post #1266 of 3704
Quote:
Originally Posted by ianmedium View Post

So funny GG, I am currently really enjoying the Mil-spec Sylvania 3S4's with the Mazda 1T4's and am just about to change over to the Phillips 3S4's.

Your description of the Lorez/Ken Rad's is pretty much what I experienced with the Lorenz/Sylvania's. That is one of my favourite combinations so far.

Though I have to say these Mazda's are something else! So quiet and now I have a number of hours on them incredible at detail retrieval, best so far and that includes the Siemens and Lorenz which have been my top detail retrieval tubes.

The ability of these Mazda's to dig deep within the sonic is rather wonderful and yet they are not analytical at all, just so creamy and deep. Bass is excellent as well!


yes, what was really amazing for me was that the lorenz df91 - philips dl92 combo in comparison to the lorenz df96 - tungsol ken rad dl92 combo sounds ....  sorry, but the words boring and lifeless came in my mind in comparison!

post #1267 of 3704
GG.

This is the response I got from Shikada San when I asked him about the 3S4T..


"It's same. and i think it work. but, output power is less than. because 3S4 is used for drive. (I don't know how power output it is.)"
post #1268 of 3704
Quote:
Originally Posted by GermanGuy View Post


yes, what was really amazing for me was that the lorenz df91 - philips dl92 combo in comparison to the lorenz df96 - tungsol ken rad dl92 combo sounds ....  sorry, but the words boring and lifeless came in my mind in comparison!

I am really glad you said that! I often wonder if my thoughts about new tubes are being read as, "oh its the latest and greatest so its better" but it is not the case. I do find incremental differences with the tubes, the only ones so far to disappoint have been the Telefunken's and I am hoping the new ones coming will change my thoughts.

But the Mil-spec early US tubes have been a revelation to me as I was not that impressed (in comparison to the European tubes) of the standard Sylvania's which sounded grainy and lifeless in comparison to others (it has to be said though that if you never heard another tube the sound of stock Sylvania's would impress you
post #1269 of 3704
Quote:
Originally Posted by ianmedium View Post

GG.

This is the response I got from Shikada San when I asked him about the 3S4T..


"It's same. and i think it work. but, output power is less than. because 3S4 is used for drive. (I don't know how power output it is.)"


i know this your post, but i think he is wrong. the 3s4t has two options to connect both parts of the heater (50 mA) or only one half (25 mA, low power mode, reduced output power)! so maybe less power, but not so much less to be unusable!!


Edited by GermanGuy - 7/26/13 at 2:58pm
post #1270 of 3704
Quote:
Originally Posted by bmichels View Post

booth hard to find indeed ! :-((

 

tung-sol ken rad dl92:  Is "Tung-sol"  the brand ?  If So, then what means "Ken Rad" ?


it is a factory for military equipment ianmedium mentioned some time ago.

post #1271 of 3704
Not quite GG, Ken Rad was a manufacturer of vacuum tubes in their own right. But like all of the US makers they combined efforts with other companies to manufacture tubes for military use so very often Ken Rads would be made by Sylvania and vis-versa.

GE took over Ken Rad just before the end of the second world war.

From what I have found so far all the Mil-spec tubes were meant to be made to the same standards across the board for continuity of use in military applications, least that is what I have read!
post #1272 of 3704

i forgot to mention that i also ordered two philips df96, so lets wait and see how they sound!

post #1273 of 3704
Quote:
Originally Posted by ianmedium View Post


I am really glad you said that! I often wonder if my thoughts about new tubes are being read as, "oh its the latest and greatest so its better" but it is not the case. I do find incremental differences with the tubes, the only ones so far to disappoint have been the Telefunken's and I am hoping the new ones coming will change my thoughts.


yes, and there is another point: if i would write about each not so good pairing i tried there were more bad than excellent combinations to read about here, but naturally we post if we find something worth to be posted, so not the rules of statistics violated, just posting what may be of interest or an improvement!

post #1274 of 3704

i hope it is ok that from time to time i post an updated list of my posts to better find older articles and topics:

tube cleaning kit:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/630#post_9573905

tube pictures:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/660#post_9579792

interconnect jacks and cables:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/690#post_9580479

my diy interconnects:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/690#post_9581240

gold plating tool:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/690#post_9581240

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/735#post_9586055

tube pins gold plating:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/750#post_9587261

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/765#post_9590026

my reference tracks /cd's to listen to the tu-05:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/780#post_9591686

standard tube rating form:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/795#post_9593228

cradle construction:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/810#post_9598458

tu-05 first impressions:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/855#post_9609995

tu-05 with lorenz - philips combo:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/870#post_9610188

my tu-05 setup with player and headphone:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/870#post_9610329

tu-05 power supply:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/870#post_9610573

tube rolling:

valvo and lorenz tube combos:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/885#post_9610868

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/900#post_9612010

telefunken:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/900#post_9612467

siemens tubes and short summary:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/900#post_9612624

valvo red label:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/915#post_9613134

listening to different interconnects:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/930#post_9614421

tube rolling: ultron tubes:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/945#post_9614695

tube pictures by manufacturer:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/945#post_9614708

protective carrying pocket for tu-05:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/960#post_9615850

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/975#post_9617363

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/990#post_9618486

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1065#post_9627641

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1140#post_9633189

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1230#post_9647002


tube rolling: valvo red label - tung-sol ken rad combo:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1020

summary and valvo red label - lorenz combo:

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1050#post_9624911

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1080#post_9629496

basic explanation of amp function and construction:

www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1095#post_9630986

tube rolling: telefunken df904:

www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1140#post_9632746

 

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1185#post_9639203

 

tu-05 - noise and rf interferences:

 

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1200#post_9642880

 

tube pictures - lorenz df96:

 

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1215#post_9643177

 

tube compatibility - df96:

 

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1215#post_9643209

 

tube rolling: lorenz df96 - philips dl92 combo first listening impressions:

 

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1215#post_9643209

 

tube cleaning kit distribution:

 

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1245#post_9649904

 

tube rolling: lorenz df96 - tung-sol ken rad dl92 combo:

 

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1245#post_9650382

 

tubes: replacement types for dl92 (and df91):

 

http://www.head-fi.org/t/632518/analog-paper-2-discussion-and-appreciation-thread/1260#post_9650615


Edited by GermanGuy - 7/26/13 at 4:06pm
post #1275 of 3704

GG,

 

I am (more than) happy to distribute the tube cleaning kits in the US.

 

And thanks for summarizing your threads and tube combo impressions, very helpful.

 

-wc

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