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Tubelab Discussion and support of Tubelab products, prototypes and experiments

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Old 14th February 2020, 10:41 PM   #501
lykkedk is offline lykkedk  Denmark
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Quote:
Originally Posted by Evenharmonics View Post
Is your real name Mikkel Leicht? I wonder how you will move that thing to your listening area... A forklift maybe?
No..haha .. Real name Jesper Lykke
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Last edited by lykkedk; 14th February 2020 at 10:44 PM.
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Old 18th February 2020, 08:27 AM   #502
itsikhefez is offline itsikhefez  United States
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Here is my TSE II 300B amp... for this one, I was in audiophoolery mood and mixed it up a little from standard BOM.

Parts selection include:
- ISO transformers iron -- FC-20S opt, LC-10-200DII choke, custom PT.
- ClarityCap TC 85uF 600V Polypropylene PS cap
- Mundorf Silver, Gold & Oil 0.1uF coupling caps.
- Resistors are mostly Takman MF but also some Takman CF, Kiwame CF in less crucial places.
- Mills MRA-10 non-inductive for the high wattage resistors.
- WBT NextGen binding posts.
- Mogami W2546 coaxial input wiring.
- Kimber TCSS 19ga wiring.
- Chassis by Landfall Systems

B+ is around 385V, bias at 80mA.
Currently using the 5K:8R tap, there is also a 3.5K tap.

Tubes are Gold Lion PX300B, Raytheon 5842 and Amperex Bugle Boy 5AR4.
Regarding the sound... I'm still looking for proper speakers...
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Last edited by itsikhefez; 18th February 2020 at 08:33 AM.
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Old 18th February 2020, 08:59 AM   #503
mctavish is online now mctavish  Austria
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Location: Niederösterreich
That is beautiful! If that doesn’t sound good, then nothing will! I built a two way out of Foster’s FF225K, and some ribbon tweeters from Fountek to go with my tubelab 300b, It’s a great combination! Sensitive enough to make a great combination. I can highly recommend them!
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Old 18th February 2020, 11:46 AM   #504
lykkedk is offline lykkedk  Denmark
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Quote:
Originally Posted by itsikhefez View Post
Here is my TSE II 300B amp... for this one, I was in audiophoolery mood and mixed it up a little from standard BOM.

Parts selection include:
- ISO transformers iron -- FC-20S opt, LC-10-200DII choke, custom PT.
- ClarityCap TC 85uF 600V Polypropylene PS cap
- Mundorf Silver, Gold & Oil 0.1uF coupling caps.
- Resistors are mostly Takman MF but also some Takman CF, Kiwame CF in less crucial places.
- Mills MRA-10 non-inductive for the high wattage resistors.
- WBT NextGen binding posts.
- Mogami W2546 coaxial input wiring.
- Kimber TCSS 19ga wiring.
- Chassis by Landfall Systems

B+ is around 385V, bias at 80mA.
Currently using the 5K:8R tap, there is also a 3.5K tap.

Tubes are Gold Lion PX300B, Raytheon 5842 and Amperex Bugle Boy 5AR4.
Regarding the sound... I'm still looking for proper speakers...
Whoow Impressive build!

You seem to have parts in control itsikhefez.
I see that the choke you use is 10H / 120 Ohm / 250mA

I myself am thinking about replacing the Triad C14X i have now (6H / 150 ohm) with an toroidal one :
Quote:
Core type toroidal
Inductance L 10H
DC Resistance 45Ω
Nominal DC Current 250mA
Nominal voltage 400V
But i don't know yet if the low resistance on that coil is good or not good in THIS build?

Contgrat's again with your'e SuperB build

Rgds; Jesper.
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Old 18th February 2020, 04:37 PM   #505
zman01 is offline zman01  Bangladesh
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itsikhefez,

Nice work, congratulations!

Quote:
Originally Posted by itsikhefez View Post
Regarding the sound... I'm still looking for proper speakers...
Sorry if this was already discussed earlier - what speakers are you using now?
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Old 18th February 2020, 10:28 PM   #506
itsikhefez is offline itsikhefez  United States
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Quote:
Originally Posted by mctavish View Post
That is beautiful! If that doesn’t sound good, then nothing will! I built a two way out of Foster’s FF225K, and some ribbon tweeters from Fountek to go with my tubelab 300b, It’s a great combination! Sensitive enough to make a great combination. I can highly recommend them!
Thank you very much! I am trying to finalize a Frugal-Horn 3 build with FE126En. If I like that style I may consider the BK-20 which supports the 8" Fostex's.

Quote:
Originally Posted by lykkedk View Post
Whoow Impressive build!

You seem to have parts in control itsikhefez.
I see that the choke you use is 10H / 120 Ohm / 250mA

I myself am thinking about replacing the Triad C14X i have now (6H / 150 ohm) with an toroidal one :

But i don't know yet if the low resistance on that coil is good or not good in THIS build?

Contgrat's again with your'e SuperB build
Rgds; Jesper.
Thank you very much! The ISO choke is heavy and does an excellent job. The amp is black silent there is zero hum or noise on the output. I have to put my ear literally on the tweeter to hear that the amp is on.

Re: the choke you're looking at, trying putting the data in PSUD and see how B+ changes with the lower resistance. I assume that 10H should filter better than 6H but make sure B+ is not too high.

Quote:
Originally Posted by zman01 View Post
itsikhefez,

Nice work, congratulations!

Sorry if this was already discussed earlier - what speakers are you using now?
Thank you! I had actually started a different thread regarding speaker recommendations.
I tried both Klipsch Quartet's and PMC twenty.21 bookshelves. The Quartets are very efficient but they dip below 4ohms and I only wired 8ohm taps. The sound is nice but nothing special, there is some lack in dynamics.
The PMC are again not an ideal speaker choice but their impedance is much closer to 8ohms most of the time and actually sound quite good. They are not too efficient so max volume is limited and sufficient only for a small room.
As mentioned earlier I am building an FH3.... I really screwed up the build and trying to still make it work. I have completed one speaker and have one more to go.
If not the FH3, I am currently trying to decide between the Zu Omen DW which should be released again in April, or a different flat pak. Something like the BK-20 or the Tang Band D4-1
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Old 19th February 2020, 12:15 AM   #507
kilokat7 is offline kilokat7  United States
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Beautiful build, itsikhefez! That's one to be proud of. Front Panel Express top plate I assume? The fit and finish look great!
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Old 19th February 2020, 03:11 AM   #508
zman01 is offline zman01  Bangladesh
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Quote:
Originally Posted by itsikhefez View Post
As mentioned earlier I am building an FH3.... I really screwed up the build and trying to still make it work. I have completed one speaker and have one more to go.
If not the FH3, I am currently trying to decide between the Zu Omen DW which should be released again in April, or a different flat pak. Something like the BK-20 or the Tang Band D4-1
itsikhefez,

I don't have any experience with the FE126EN, but have heard the FE206EN and FE166EN, and those drivers also have a more "forward" presentation vs more "neutral" sounding speakers. Some folks love them, others not so much, but each to their own. Do you have the drivers already?

The BK-20 is an older design - there are quite a few newer and better designs available now.

Your PMC Twenty.21 is a different beast altogether - looked up a review, and doesn't look like a good match for a low watt single ended tube amp. It is likely that they will sing much better paired with a good solid state amplifier with more power.
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Old 19th February 2020, 03:15 AM   #509
itsikhefez is offline itsikhefez  United States
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Quote:
Originally Posted by kilokat7 View Post
Beautiful build, itsikhefez! That's one to be proud of. Front Panel Express top plate I assume? The fit and finish look great!
Thank you very much, much appreciated! I used the FPD software but Landfall made the entire chassis, including CNC the top plate.

Quote:
Originally Posted by zman01 View Post
itsikhefez,

I don't have any experience with the FE126EN, but have heard the FE206EN and FE166EN, and those drivers also have a more "forward" presentation vs more "neutral" sounding speakers. Some folks love them, others not so much, but each to their own. Do you have the drivers already?

The BK-20 is an older design - there are quite a few newer and better designs available now.

Your PMC Twenty.21 is a different beast altogether - looked up a review, and doesn't look like a good match for a low watt single ended tube amp. It is likely that they will sing much better paired with a good solid state amplifier with more power.
I have a pair of FE126En, one is in the single completed FH3 and the other is waiting for me to complete the other speaker.
The PMC was never intended for the TSE, but I tried it just because I had it around. I am finishing a Firstwatt F5 clone that I am going to try with the PMC.

Do you have any suggestions for pairings? Perhaps can be discussed over at the other thread...
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Old 20th February 2020, 02:35 AM   #510
csample is offline csample  United States
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Quote:
Originally Posted by itsikhefez View Post
.. I'm still looking for proper speakers...
Your build looks very nice! If you are considering a full range speaker I am very happy with my FE206En Woden Designs Vulcans. They were a fun build, 96dB sensitivity, very good bass and low cost. My wife even says nice things about how they look

Woden Designs Vulcan
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