Lampizator announcement: launch of our all new TOTL HORIZON DAC

DSG Rob

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May 8, 2019
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On the topic of tubes, 300b's to be exact. Lampizator North America is now an authorized reseller of Western Electric 300bs tubes.

Listed on our North American website for sale. 5yr warranty (upon return of warranty card)

Manufactured in a new state of the art factory in Georgia (USA). These 300b's are very hard to beat.

 
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Lukasz "Lampizator" Fikus

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Do the Serbian tubes need adapters?
No. Straight KT
Hmm.. keeping my score card of dead tubes handy, here’s the tally:

1. KR 242 (first set died, second set seems to be holding up so far).
2. KR T-100 (one tube died within a few hours of being fired).
3. PSVane 101D (new set, one died within a few hours)
4. VAIC 45 (two tubes died, two survived, seller took them back)
5. NOS 45 (two died, rest are doing ok so far)

It is not a pretty picture. If I didn’t like the Pacific so much, I’d have thrown in the towel. 300Bs are doing fine so far, PX 25s are also doing fine.
So you probably noticed I moved away from DHT.
 

Lukasz "Lampizator" Fikus

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Something must be wrong there , I had my DHT tubes rolled in GG, then GG2 and PAC. Never ever lost a tube in any of them through last 6 years or so. All if them are testing like new even today. It is not normal, why you didn't sent it back for the factory check, Something must had happened in transport I believe, as it is impossible for the factory to let the tube killer dac out. No chance.
Dac can not by definition kill the tube. No matter what happens. Tube Manufacturing lack of Q control does.
 

microstrip

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Lukasz "Lampizator" Fikus

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I can sympathize, as I have gone through quite a number of DHT's and a rectifier in my Pacific. I think it mostly is the result of quality control issues at Kron, as they all were KR tubes. Lampizator acknowledged that the first run of RK 300B's had many life issues.

My first RK Anniv 5U4G was also clearly defective, but sneakily so, and it likely caused the demise of 3 of the 5 DHT failures I had due to it arcing sporadically - - something I found out by accident. I kept blowing fuses in my DAC during the phase where I lost 3 RK 300B's in a row over ~3 months from first getting my Pacific. Lukasz coached me in starting up the tubes softly at a point 3 clicks down, and then bringing them up to full after a few seconds as an attempt to help them live. It was once while doing this as I was looking down at the tubes from overhead to see how hot their filaments appeared that I saw a fireworks display go on in the RK 5U4G! After that rectifier was replaced (rectified!), I stopped losing DHT's so fast. But I still lost another RK 300B at ~800 hours or so, and an RK PX25 after ~30 hours. Common thread in all of this is Kron.

My T100's have been perfect, as have my KR 242's, so far.
Kron admitted to having a bad batch of tungsten wire which was meant for bulbs and hence pre- cut for planned obsolescence. That took a whole year 2019 out of my life. I personally lost circa 100k$ on that.
 

bonzo75

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Feb 26, 2014
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I put 16 WE 300B tubes in my amplifiers and paid $750 a tube. Maybe I should sell them.

BYW, I have knock on wood, never had a problem with any tube in my Pacific.

16 300bs! How do you ensure they are all in sync? What happens if one fails, only that one can be replaced and the amp will stay balanced or will the new tube cause it to go out of sync
 

Willgolf

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Jul 22, 2019
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16 300bs! How do you ensure they are all in sync? What happens if one fails, only that one can be replaced and the amp will stay balanced or will the new tube cause it to go out of sync
I did have one fail in my amp. I had an extra one that I was going to use in my Pacific that was part of the 18 that I originally purchased. So, from my perspective, it was not a problem.
 

godofwealth

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Feb 8, 2022
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Dac can not by definition kill the tube. No matter what happens. Tube Manufacturing lack of Q control does.
That’s my conclusion as well. I have several tube sets that seem to be working fine in my Pacific. I don’t think it’s the DAC. Tubes can be very unreliable. I heard horror stories about the KT150 tubes from folks with ARC amps that use them. Some tube vendors now refuse to carry them due to reliability issues at the Russian factory. Generally tube reliability has gone downhill. My new PSVane 101D died in my Lampi within an hour or two of firing it up. By contrast I once owned a tube McIntosh tuner, the MR 67, that was happily chugging along on its original tubes 60 years after it left the factory. Only reason I sold that tuner was I was moving to the west coast where I’m not close to any FM station worth listening to. But I was at a college campus in New England for almost 20 years with a fantastic Public Radio station. I enjoyed many hours listening to music on the MR 67. The sound was so good it gave my other sources (vinyl, CD) a good run for their money.
 

mr.gregdee

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Oct 3, 2016
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Actually the story of KT90 is a bit different and as per my Serbian sources they've not been made for Telefunken. Rather they have been developed and commissioned to be developed for Manley Labs at the beginning of 90's which had an exclusive rights for distribution and sales of this particular model...

Post from Eve Manley which I actually found in a thread here on WBF:
"I was there at the factory twice in in January 1990, mid 1991, and DM went a third time without me.

I was first in Nis the first week of January 1990 where they showed us the first prototypes of the KT90. There had been some correspondence between DM and the Ei factory for almost a year before our visit as to what he wanted them to build. (See my post above regarding the KT90 NOT being based on the EL519.)

The actual engineering of the guts of tube was done primarily by the head Ei engineer, Blagomir Bukumira. We took home four samples and did the initial testing. Some suggestions were made and production began. This was the first "red" paint version. As with any first production run, of which we had to buy ALL of them, there were things to be improved upon.

The second version incorporated some structural modification suggestions from Bill Perkins. This was the "blue" version. You can see the additional spot welds for the concentric inner anode structure if you compare them. More meat. As I have previously posted, in 1993, tubes that fell outside our acceptable parameters were sold to a certain tube vendor who put on a prettier brown base and silk-screened their own "KT99" logo onto the glass.

Then the war started and the embargo went up and none of us could get tubes out of there. The factory also was having trouble getting raw materials IN. Contrary to rumors at the time, the Ei factory was NOT bombed, as we now know.

There later came a third version with wings outside the anode structure but gone was the additional inner plate structure needing all those spot welds.

The latest KT90's I have here, what I would call the 4th version, the sacrificial element tacked onto the anode structure that was square is now circular. Other than that, it looks like the version 3 tubes to my eye.

Here are some quick pictures I just put up for you.

KT90's I have known and loved...
As for bad blood, there was some disappointment as we were supposed to be the world exclusive distributors for the KT90 but this part of the contract was not ultimately honored by the factory, although it was basically more or less enforced for two years. It was the "less" part of this equation that raised some concern. On the other side, it was understandable that other tube amp manufacturers were not happy to have to buy their tubes from a competitor in the tube amps biz who had been granted "exclusive rights for the whole world concerning advertising, sampling, and sale."

I have faxes from Ei-RC from March 1991 outlining all of this. It is quite interesting stuff.

With this, with the war, with all the weirdness that went down, perhaps the factory's memories fall short in some areas, but I was there and I have the original correspondence needed to refresh my memories.


Cheers, Eve Anna Manley, Manley Labs"

Actually the story of KT90 is a bit different and as per my Serbian sources they've not been made for Telefunken. Rather they have been developed and commissioned to be developed for Manley Labs at the beginning of 90's which had an exclusive rights for distribution and sales of this particular model...

Post from Eve Manley which I actually found in a thread here on WBF:
"I was there at the factory twice in in January 1990, mid 1991, and DM went a third time without me.

I was first in Nis the first week of January 1990 where they showed us the first prototypes of the KT90. There had been some correspondence between DM and the Ei factory for almost a year before our visit as to what he wanted them to build. (See my post above regarding the KT90 NOT being based on the EL519.)

The actual engineering of the guts of tube was done primarily by the head Ei engineer, Blagomir Bukumira. We took home four samples and did the initial testing. Some suggestions were made and production began. This was the first "red" paint version. As with any first production run, of which we had to buy ALL of them, there were things to be improved upon.

The second version incorporated some structural modification suggestions from Bill Perkins. This was the "blue" version. You can see the additional spot welds for the concentric inner anode structure if you compare them. More meat. As I have previously posted, in 1993, tubes that fell outside our acceptable parameters were sold to a certain tube vendor who put on a prettier brown base and silk-screened their own "KT99" logo onto the glass.

Then the war started and the embargo went up and none of us could get tubes out of there. The factory also was having trouble getting raw materials IN. Contrary to rumors at the time, the Ei factory was NOT bombed, as we now know.

There later came a third version with wings outside the anode structure but gone was the additional inner plate structure needing all those spot welds.

The latest KT90's I have here, what I would call the 4th version, the sacrificial element tacked onto the anode structure that was square is now circular. Other than that, it looks like the version 3 tubes to my eye.

Here are some quick pictures I just put up for you.

KT90's I have known and loved...
As for bad blood, there was some disappointment as we were supposed to be the world exclusive distributors for the KT90 but this part of the contract was not ultimately honored by the factory, although it was basically more or less enforced for two years. It was the "less" part of this equation that raised some concern. On the other side, it was understandable that other tube amp manufacturers were not happy to have to buy their tubes from a competitor in the tube amps biz who had been granted "exclusive rights for the whole world concerning advertising, sampling, and sale."

I have faxes from Ei-RC from March 1991 outlining all of this. It is quite interesting stuff.

With this, with the war, with all the weirdness that went down, perhaps the factory's memories fall short in some areas, but I was there and I have the original correspondence needed to refresh my memories.


Cheers, Eve Anna Manley, Manley Labs"
very good post Goran and valuable finding, thank you for sharing this
 

mr.gregdee

Well-Known Member
Oct 3, 2016
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gpoint-audio.com
Dac can not by definition kill the tube. No matter what happens. Tube Manufacturing lack of Q control does.
Fair enough, that was my initial thought either, which now with a further 300b fails reports comes to sensible explanation.
 

Ron Resnick

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Jan 25, 2015
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I must admit that I like the idea of a set of stock tubes from which to start and get a base line BUT by the same token I do understand Lukasz plight as to sourcing tubes as well as the sky rocketing prices so yes there are two sides Ito every story. However to dump on him when those desires just aren’t available any more is unfair and unwarranted.

+1
 

Ron Resnick

Site Co-Owner, Administrator
Jan 25, 2015
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Kron admitted to having a bad batch of tungsten wire which was meant for bulbs and hence pre- cut for planned obsolescence. That took a whole year 2019 out of my life. I personally lost circa 100k$ on that.

EEESH!!! That's bad! My uninformed reaction is that Kron is lucky this didn't put them out of business.
 

Willgolf

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Jul 22, 2019
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Lukasz....can you give us an update on how the production of the H is going? How many have now been produced? Are you on pace to do 3 a week?
 

Sampajanna

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Apr 1, 2021
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I hope I am one of those 3 soon. I think so!
 
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Willgolf

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