45 Luv

happyrabbit · « **Reply #60 on:** 3 Jun 2017, 07:20 pm »

Have soldering iron..will upgrade

Clarity TC 10uf

Docere · « **Reply #61 on:** 4 Jun 2017, 06:05 am »

Looks like you are using the TCs to bypass larger PS capacitors. Curious to know what you think - what are you bypassing and what changes have you noticed?

I have some a set of TCs sitting on the shelf for my whole PS and have been considering whether I should replace and/or bypass them in various potions. I'm jumping the gun even thinking about it - best to wait until my amp is built and settled in before making a decision.

Cheers.

sfox7076 · « **Reply #62 on:** 5 Jun 2017, 03:02 am »

I use TCs in my 01A pre. I used them straight, no bypass. I find bypass caps to not be worth the money. I am taking a break from audio building. Working on an old laboratory tube "tester" from the 50s.

happyrabbit · « **Reply #63 on:** 6 Jun 2017, 04:06 am »

Docere ,

The TC caps are bypassing the 45's. the sound field appears to have expanded & move forward a bit.

It appears the C-R-C filter is for the drivers. I am no expert on the Korneff circuit.

I should have the EML DHT PREAMP next month.. fingers crossed

Dwight

Docere · « **Reply #64 on:** 6 Jun 2017, 09:21 am »

Hi Dwight,

Thanks for the info about the sonics! To share right back at you:

The 10uF TCs are bypassing the output stage electrolytic power supply capacitor. That electrolytic capacitor has two separate sections (like two capacitors in one); it has a +ve terminal for each section (2) and a common -ve terminal. Each +ve terminal appears to be connected to the output transformer via a red wire. You can see each TC connected from a +ve terminal of that same electrolytic to ground - the TCs are bypassing the output stage PS capacitors.

The adjacent electrolytic capacitor - connected via the Kiwame (light green) resistor to the output stage electrolytic capacitor - is the driver stage power supply capacitor. You can see the red wires running from the +ve terminals to the driver stage.

The 45 cathodes are bypassed by the 40uF Clarity PX capacitors. You can see them connected to each end of the brown (Mexico manufacture) Mills 12W cathode resistor.

Hope this helps.

Thanks sfox also - good to know about the TCs... I'll run with them for a while.

Cheers,
Ray

happyrabbit · « **Reply #65 on:** 28 Jun 2017, 04:19 pm »

Almost done..

Slam · « **Reply #66 on:** 28 Jun 2017, 10:07 pm »

I've always wanted to try a 45 amp. I've got a good pair of efficient Omega speakers. Are there any amps that are at or below $1K that are worth trying? I can't seem to find any.

thanks

sfox7076 · « **Reply #67 on:** 29 Jun 2017, 02:19 pm »

Oliver's Korneff is where I would go. I think that is sub $1k.

Hope I get to hear that EML beast before it leaves. I have to tell you, I am done with resistor volume controls. TVC all the way. OK, I will ignore that resistors are all over the place in the rest of the circuit. Oops.

Shawn

roscoe65 · « **Reply #68 on:** 29 Jun 2017, 04:00 pm »

Quote from: sfox7076 on 29 Jun 2017, 02:19 pm

Oliver's Korneff is where I would go. I think that is sub $1k.

Hope I get to hear that EML beast before it leaves. I have to tell you, I am done with resistor volume controls. TVC all the way. OK, I will ignore that resistors are all over the place in the rest of the circuit. Oops.

Shawn

Olver's version of the Korneff will only be less than $1k if you choose vintage RTR Tamura transformers. The cost of new, high quality iron will push the price to $1,200-1,500.

happyrabbit · « **Reply #69 on:** 29 Jun 2017, 08:37 pm »

SFOX,

DHT 71A with TVC's.. It was ok. Sold it many moons ago. I gave the TVC's serious consideration but decided against it.

YMMV

Dwight

Slam - Sent you a link for one on US AUDIO MART.

Slam · « **Reply #70 on:** 30 Jun 2017, 11:58 am »

Thanks for the link happyrabbit and thanks for the tip sfox7076.

sfox7076 · « **Reply #71 on:** 30 Jun 2017, 01:12 pm »

I have to say that I am not a huge 71A fan. But that's me. I really prefer the 01A. Comparing it to a relay driven R2R attenuator, a Khozmo attenuator and a TVC, the TVC won out for me. But as you say, YMMV.

FullRangeMan · « **Reply #72 on:** 30 Jun 2017, 04:06 pm »

I have a Khozmo 48 steps from Poland.
Post 178/179: http://www.audiocircle.com/index.php?topic=129713.160
How is the TVC sound in your opinion?

Docere · « **Reply #73 on:** 1 Jul 2017, 05:29 am »

Quote from: happyrabbit on 28 Jun 2017, 04:19 pm

Almost done..

Hi Dwight,

Looks interesting - is that the EML20B Oliver was looking into building for you? Is that the PS on the left... or a different amp? What will your system gain be?

And finally, how are those dc10audio working out for? I'm thinking of moving to smaller speakers and keep changing my mind - I really need to write down what is important so I can maintain perspective...

Anyway, it can wait until the new monos are built. Today I completed the drawings/specs for the Delrin sub-chassis and panels... but still have the stainless chassis design and hardware BOM complete.

Your system is coming along nicely - well done.

Cheers,
Ray

sfox7076 · « **Reply #74 on:** 1 Jul 2017, 11:03 am »

I find the TVC more detailed than the khozomo. The one I used was his standard with upgraded resistors.

mkane · « **Reply #75 on:** 1 Jul 2017, 10:52 pm »

I've 2- 45 amps both TSE's. One with EP the other with Edcor Iron. Work great with OB.

happyrabbit · « **Reply #76 on:** 3 Jul 2017, 12:01 am »

Docere,

It's the EML 20b DHT PRE by Mr Oliver . Power supply on the left. The 20b's mu is ~ 21. The voltage gain is a bit on the high side but perfect for driving my setup.

The dc10 audio speakers are outstanding but the 45 SET limits the speakers to a smaller room. Please post build pics once you start your project !

And thank you for your kind comments

Dwight

drummerwill · « **Reply #77 on:** 3 Jul 2017, 12:57 am »

My 45 amp has a type 26 powered front end and E-P PSSS outputs.

Willie

happyrabbit · « **Reply #78 on:** 2 Aug 2017, 03:32 am »

Da preamp has arrived.. SET meets DHT

happyrabbit · « **Reply #79 on:** 2 Aug 2017, 02:16 pm »

Couple more pics of the preamp..