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Just now, Odyssey said:

 

Sounds great to me nevertheless with headphones. In fact I have a slight preference of it over the 300b ... ymmv as usual.

 

I don't use KT150 tubes though. I will use KT88, KT77, EL34, 6550, 807, etc

They all sound good, it is all subjective and depending on what type of muisc too ?

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Here is a recent pic of most of my lounge room system.   The McChanson 300B )Shuguang Black Treasures) is to the right [next to the Elekit (then 5881) SEPentode amp]. I am trying the 6FD7 dr

My McChanson

My little 12 W PP Triode on the left and the newer 300B SET on the right with the Sansui SR-929 TT above...Pioneer PD-7700 CDP below...  

Can you take a shot of it from above or the front. I want to see the whole amp to see how it looks. Yours is using 6as7 right?

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9 minutes ago, dwbasement said:

I changed the look of mine a bit...timber side panel, solid aluminium knob and isoacoustics feets...

20210409_231737.jpg

Hey Dennis you amp looks so good man!!!!!!! color coordination, silver chassis with black knob!!!! Very impressive looking amp...

 

show us another angle of your amp... want to see your wooden side panel...

Edited by xtiva2000
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On 19/11/2020 at 3:18 PM, dwbasement said:

I use the 6AS7 parallel SET approx 12wpc, more than enough to drive my hybrid horns setup which is still evolving atm, recently added a pair of small tweeter horn so the mid horn can just do its own duty. Next year will look at building the woofer box to complete the project.

I used to have a few of Eric's amps but the 6AS7 is what left becasue this is the one that sings best with my setup.

I am a good friend of him, I think I have tried most of his amps, and we had a few get together sessions to try out his different amps...etc. and actually I have his first 6AS7 amp, as you all know 6AS7 is very popular in the headphones amps world. So I asked Eric to design one for me using the 6AS7, it was started as a power amp to go with his 12AU7 pre amp. Since then my 6AS7 has gone through many rounds of surgery, upgraded to a stage that Eric said there is nothing to change.... it is now an integrated amp without any caps.

It still has his marzE transformer which is now discontinued. I also added bits and pieces myself to change the look a little. Timber trim on the sides, big solid aluminium knobs and removed the words on the front panel  also changed the feets to viprapod cones. 

20201119_150201.jpg

 

I see it here now. It's gorgeous. Looks good with the interstage transformers even if it looks a bit crowded. I bet that will sound great with headphones too. I should show Eric this.... ?

 

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On 20/10/2020 at 10:17 PM, doogie44 said:

Here is a recent pic of most of my lounge room system.

 

The McChanson 300B )Shuguang Black Treasures) is to the right [next to the Elekit (then 5881) SEPentode amp]. I am trying the 6FD7 driving tubes with adaptors.

 

In the front is the Line Magnetic EL84-based 219iA Mini SEP & headphone amp (3W output). Back left is the king--the Line Magnetic 518iA SET 845 amp. Feeding them in the very back is the Leben RS-28CX valve preamplifier (with phono). Other sources are the Clearaudio performance T/T (with Maestro Wood MM); the Naim NAT-01 tuner (hidden); the Audionote CD-2 CD player and the Cambridge CXN streamer.

 

Speakers are the Tekton Design Perfect SET 15 (98dB + 8 ohm). 2 x REL Storm5 subs are stashed elsewhere out of frame.

 

I rotate through the amps according to whim and specific music. The FM radio (ABC or 2MBS Fine Music) via the 845 amp takes some beating.

 

It's a tough gig but someone's got to do it!

 

Nice collection of tube amps. I have Elekit TU-8500 / TU-8200, Oblivion, a custom amp coming from Sweden using Sowter transformers and I'm thinking of getting Eric's 300b or his KT150 amp.

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7 minutes ago, Odyssey said:

 

I see it here now. It's gorgeous. Looks good with the interstage transformers even if it looks a bit crowded. I bet that will sound great with headphones too. I should show Eric this.... ?

 

He seen it before, we chat every now and then. ?

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12 minutes ago, dwbasement said:

Here is the top and side.

2 x 6AS7 running parallel.

20210409_233900.jpg

 

OH awesome!!!! is wooden panel your DIY or did Eric do that for you?

 

looks so much better man :)

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9 minutes ago, xtiva2000 said:

 

OH awesome!!!! is wooden panel your DIY or did Eric do that for you?

 

looks so much better man :)

I did it myself at different times. Eric is technical, he builds great sounding amps, that is just Eric ?

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2 minutes ago, dwbasement said:

I did it myself at different times. Eric is technical, he builds great sounding amps, that is just Eric ?

lol I know exactly what you mean :) 

 

Amp only has only those that are necessary for the sound.. nothing else :)

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I’m going to have Eric make me a 300b amp instead. There has to be a 300b in my stable. ?

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11 hours ago, dwbasement said:

Here is the top and side.

2 x 6AS7 running parallel.

20210409_233900.jpg


Eric did say that your amp is the best sounding in his opinion. I have to invite myself over one day. ?

 

Parallel 6as7g and double choke ... I have to witness that in action.

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3 minutes ago, Odyssey said:


Eric did say that your amp is the best sounding in his opinion. I have to invite myself over one day. ?

 

Parallel 6as7g and double choke ... I have to witness that in action.

That's what he said haha, it also has the interstage trannies.

He said it because he has been to my place for couple of gtg with his other amps. 

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Finally got to try using the KT88 amp driving my main Axis LS88. New respect for Eric's amp now. Sounded better than my vintage Kenwood KA 3300D.  I'm so looking forward to the 300b amp. @xtiva2000 was present.

 

 

 

IMG_2182.jpg

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Just listening to one of Eric's 300B SETs right now...CD...Dexter Gordons...One Flight Up...T1...Tanya...18 minutes of bliss...

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53 minutes ago, Odyssey said:

Finally got to try using the KT88 amp driving my main Axis LS88. New respect for Eric's amp now. Sounded better than my vintage Kenwood KA 3300D.  I'm so looking forward to the 300b amp. @xtiva2000 was present.

 

 

 

IMG_2182.jpg

 

Man listening to my HD800 one thing but today it opened up on what Eric's amp can bring out.  Totally amazed!!!!!...

I only have a little bookshelf so can't get that much of body and depth but yeah very impressed with the amp!!!!

My little Martin Logan Motion 15i Speaker using as nearfield 

 

20210411_142647.thumb.jpg.4018a3f3cf2abf5f59c93312fe324d5e.jpg

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On 10/04/2021 at 11:43 AM, dwbasement said:

That's what he said haha, it also has the interstage trannies.

He said it because he has been to my place for couple of gtg with his other amps. 

Sounds awesome. How many watts do you get from the parallel 6as7's?

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On 10/04/2021 at 11:34 AM, Odyssey said:


Eric did say that your amp is the best sounding in his opinion. I have to invite myself over one day. ?

 

Parallel 6as7g and double choke ... I have to witness that in action.

 

If you get a 300B custom job ask for the interstage trafos to be fitted like in Dennis' awesome amp above. ?

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1 hour ago, crtexcnndrm99 said:

Sounds awesome. How many watts do you get from the parallel 6as7's?

It will be around 12WPC

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On 11/04/2021 at 8:07 PM, xlr8or said:

 

If you get a 300B custom job ask for the interstage trafos to be fitted like in Dennis' awesome amp above. ?

 

Thanks. I'm having interstage transformers in my custom 300b amp together with upgraded CMC style tube sockets, RCA and speaker posts. Built should be starting soon.

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In the early stage of my talk with Eric, it was propose that a special silver chassis and 3 chrome silver marzE transformers will be used but the matching choke is missing. On top of that, adding the black interstage transformers means it's not matching visually. ?

 

So I've settled on a deeper chassis with silver front plate and black metal top plate. All transformers and choke will be timE and in black. 

 

This is what Eric has to say about Interstage transformers - 

 

When one considers the need to an upgrade to the existing coupling cap - one can either think about good caps like Mundorf Supreme Silver Oil or  others, an alternative is to use I T ( Interstage Transformer) instead. I post a link here from Audio Note advertising their ITs and quote a paragraph extract from there: 

https://www.audionote.co.uk/interstage-transformers

Replacing any coupling capacitor with a well designed and correctly matched driver or interstage transformer yields an almost shocking improvement in sound and should be tried to fully understand what a good wideband transformer has to offer.

I do design and order 10 pieces of I T using Z11 core with interlaced winding

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Matt, get some solid aluminium knobs for Eric to replace the plastic knobs. Also get 4 nice feets to replace the plastic ones.

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7 hours ago, dwbasement said:

Matt, get some solid aluminium knobs for Eric to replace the plastic knobs. Also get 4 nice feets to replace the plastic ones.

 

Haha ok... I didn't know they are plastic ones. If I didn't already spend a bomb on my forth coming Swedish KT88 amp which incidentally I call 'Odyssey', I would have paid more attention on this 300b's appearance amp from Eric. Any other upgrades within reasonable means? ?

 

For the KT88 amp, I went with Sowter UK transformers, Mundorf caps and Yamamoto's sockets and a snazzy chassis. Can't wait to see this in the flesh and to hear it.

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1 hour ago, Odyssey said:

 

Haha ok... I didn't know they are plastic ones. If I didn't already spend a bomb on my forth coming Swedish KT88 amp which incidentally I call 'Odyssey', I would have paid more attention on this 300b's appearance amp from Eric. Any other upgrades within reasonable means? ?

 

For the KT88 amp, I went with Sowter UK transformers, Mundorf caps and Yamamoto's sockets and a snazzy chassis. Can't wait to see this in the flesh and to hear it.

I think that would be it.

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Posted (edited)
On 09/04/2021 at 11:19 PM, dwbasement said:

I changed the look of mine a bit...timber side panel, solid aluminium knob and isoacoustics feets...

20210409_231737.jpg

 

Hi @dwbasement that's a beauty I bet it sounds just as good as it looks...if not even better!

My 300B SET 12W has no side bespoke wooden panels, never even entertained that possibility at all, talk about thinking outside the square!...not sure if mine warrants such a customized effort/co$t like yours though it does look smick and inviting and has an appearance that is so easy on the eyes!

Mmmm Birds Eye Maple wooden polished sides...I wonder! :) 

Like yours I have no logo/writing on that front aluminium silver panel except for black 'power' font/script under the push power button...nice and clean and uncluttered and also very easy on those old eyes of mine...also once those RCA outlets/inlets are chosen and set!... nothing else to worry/read about but the volume and power dials!  :)  Now i'm intrigued by your addition of the pod/feet under the Amp...are they interchangeable with Eric's...both screw in/out?!?  Co$t and where to obtain?!?

And do those pods make a difference to the musical sound at all?!? And then the further double whammy of adding a wooden base placed over sprung legs under the whole lot...shirley their is a discernible improvement in the overall sound as well again...was it worth going to all that trouble...or simply to please the symmetry/eyes with matching your system's TT's?!?!

I also asked Eric to include the Interstage T in my 300B and upgrades in Valve sockets and RCA outlets and a super expensive german sounding brand of cap(forgotten!) to maximize the use of a 274B Rectifier...it is also very quiet in operation...very happy McChanson Amp owner!  I do like the black appearance of the top plate and Trannies but jeez they highlight the light flutter of white accumulating dust! :)  so I have a super fine paint brush handy nearby to do the flick off dust...and also large white cotton gloves to interchange my 300B valves...very paranoid when squeezing the valves to move them in/out of their sockets...always think I am going to burst them like eggs...gently, gently back and forth does it, then a final lift!

 

Edited by BLAH BLAH
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Hold the base of the valve when inserting or removing, not the envelope :thumb:

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Just now, muon* said:

Hold the base of the valve when inserting or removing, not the envelope :thumb:

With my fat soft old fingers I find that the shiny smooth plastic of the valve base becomes slippery to grip and give the old upward heave ho to...it really is a tight valve grip in their sockets...I have done the old gentle back and forth...at their base to help with the lifting and have managed to break off the black stem with one of my 6L6GC black plates... :( 

Not sure why the shiny smooth plastic on the bottom of valves are not manufactured with a roughness or ripple to maximise for both finger grip and lift...make it all so much easier!

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I agree, it would be easier if the base was textured.

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Here’s Eric very interesting and humorous reply. I’m starting to enjoy my conversations with him. ?

 

Can’t wait to see and hear the finished amp!

 

I shall provide with two solid silver ( Not sterling silver !! )  knobs - but you can change yours later if you prefer.. Standard chassis feets provided. 
 
All transformers are black, including power transformer, two timE outputs, two filter chokes and two Interstage transformers. totally 7 pieces, vs 5 tubes, It is a more iron than glass amp !!!

 

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5 hours ago, BLAH BLAH said:

 

Hi @dwbasement that's a beauty I bet it sounds just as good as it looks...if not even better!

My 300B SET 12W has no side bespoke wooden panels, never even entertained that possibility at all, talk about thinking outside the square!...not sure if mine warrants such a customized effort/co$t like yours though it does look smick and inviting and has an appearance that is so easy on the eyes!

Mmmm Birds Eye Maple wooden polished sides...I wonder! :) 

Like yours I have no logo/writing on that front aluminium silver panel except for black 'power' font/script under the push power button...nice and clean and uncluttered and also very easy on those old eyes of mine...also once those RCA outlets/inlets are chosen and set!... nothing else to worry/read about but the volume and power dials!  :)  Now i'm intrigued by your addition of the pod/feet under the Amp...are they interchangeable with Eric's...both screw in/out?!?  Co$t and where to obtain?!?

And do those pods make a difference to the musical sound at all?!? And then the further double whammy of adding a wooden base placed over sprung legs under the whole lot...shirley their is a discernible improvement in the overall sound as well again...was it worth going to all that trouble...or simply to please the symmetry/eyes with matching your system's TT's?!?!

I also asked Eric to include the Interstage T in my 300B and upgrades in Valve sockets and RCA outlets and a super expensive german sounding brand of cap(forgotten!) to maximize the use of a 274B Rectifier...it is also very quiet in operation...very happy McChanson Amp owner!  I do like the black appearance of the top plate and Trannies but jeez they highlight the light flutter of white accumulating dust! :)  so I have a super fine paint brush handy nearby to do the flick off dust...and also large white cotton gloves to interchange my 300B valves...very paranoid when squeezing the valves to move them in/out of their sockets...always think I am going to burst them like eggs...gently, gently back and forth does it, then a final lift!

 

Hi John, I love the sound of my amp, the side panels are just some dressed pine from bunnings, I stained to match my phono's side panel as they were sitting side by side before I added the 2nd tt. 

The ikea chopping board also stained the same colour and yes part of the reason is to match the tt setup also I think the board and the feets together do provide a bit more weight to the sound, they obviously look good to my eyes so I am happy with it.

I used to have the vibrapods and cones before for the feet but later changed to these isoacoustic pucks. They are just sit under the amp no need to fix them. They are not the new series pucks which are more expensive, these are just the standard pucks 80 bucks for 2, sometimes they sre on special fmwith 15% off.

Overall I think they all add up and improve the overall sound a bit.

Edited by dwbasement
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8 minutes ago, dwbasement said:

Hi John, I live the sound of my amp, the side panels are just some dressed pine from bunnings, I stained to match my phono's side panel as they were sitting side by side before I added the 2nd tt. 

The ikea chopping board also stained the same colour and yes part of the reason is to match the tt setup also I think the board and the feets together do provide a bit more weight to the sound, they obviously look good to my eyes so I am happy with it.

I used to have the vibrapods and cones before for the feet but later changed to these isoacoustic pucks. They are just sit under the amp no need to fix them. They are not the new series pucks which are more expensive, these are just the standard pucks 80 bucks for 2, sometimes they sre on special fmwith 15% off.

Overall I think they all add up and improve the overall sound a bit.

Hi Dennis thank you for the in-depth reply....if those isoacoustic pucks improve your sound that is good enough for me...will hunt down a set for my SET!!! :) 

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I'd like to share the best way of removing octal tubes from tube sockets without breaking the guide key underneath. Study the position of the key ridge before inserting the tube into its socket and mark its position on the tube base. When inserted and removal is required wiggle it left and right only relative to the position of the key ridge, which should also align horizontally across the mounting holes for the tube socket. Do not rotate it around like removing 9-pin minis as the guide key will break off.

 

For UX4 sockets there is no guide key available. Therefore, before insertion study the tube socket carefully and take a photo of the 4 holes. You will note that a square shape can be formed when you align horizontally across in the direction of the mounting holes for the tube socket. Again, when inserted, wiggle the tube left and right only relative to this direction to remove it.

Edited by xlr8or
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Regarding the handling of tubes @muon* is absolutely correct that they should always be grasped at the base when inserted/removed. If the tube base is oily clean it with metho and cotton buds, and avoid touching any printed labelling and etched codes so they aren't removed. Use a moist paper towel to periodically clean the tube base. Any residue can be lifted easily this way.

 

For the glass envelope use metho for any stains and moist paper towel for the other areas to clean 'fogged up' areas, which again are free from printed labels and etched codes. You don't want any water touching the fragile labelling or etched codes as they can come off easily. A glass envelope that is clean and free of residue will sound much better sonically.

 

Before you all ask me I clean my incandescent light bulbs in the same manner to achieve maximum brightness even for the frosted types. ?

Edited by xlr8or
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Yes, doing it by grasping the glass envelope will in the longer (hopefully not shorter) run help the glass envelope part ways with the base ?

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5 hours ago, dwbasement said:

The ikea chopping board

 

Yeah this thing is so versatile :)  I also made my shelf out of those chopping board..

 

need to go out and get the new chopping board to put under my KT77 (currently has Brimar 6L6GA tube)  

 

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It's set in concrete. Eric will start building my 300b starting new week. Here's the specs...

 

The Amp :  

 

It is a 300B timE amp as described on eBay, but with the following addition / modifications :

 

The amp will use a high profile and slightly bigger black chassis with silver front panel without print. Silver knobs will be provided to make it look good. The amp is a timEt amp meaning it is served by a pair of Interstage Transformer (instead of coupling cap ), All black transformers (total 7 pieces) are installed on the top plate. A pair of standard Psvane 300B is provided. Usual 6EM7 driver tubes and a 5Z4P rectifier for you as spare. The amp is also with hardware upgrades to CMC style speaker posts, 4 x RCA inputs and tube sockets. Speaker outs are 4 and 8 ohms.

 

As the amp is also a headphone amp, one standard headphone jack and one XLR 4 - pin socket are installed ( both provided by user ) - both connected to 4 ohm out. and a speaker silent switch is installed. Two filter chokes are used to achieve low humming to a possible minimum. 

 

It is a more iron than glass amp. 

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