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Posted (edited)

But you have not seen the Man in Black and my priceless new M51.

 

 

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Edited by Odyssey
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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...  

Setup so that I can plug my LCD4 into either amps which are connected to the M51. The little switch box helps to switch... tubes are ready to be sampled in the KT150 amp.

 

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Posted (edited)

There's Sword of Destiny. 😋 Don't think I want to return Sword to Eric. Of course he has no clue what is Sword.

 

The RCA 6L6 in Sword is just amazing. It's a priceless sword now. Dennis's Mullard GZ34 metal base is in Destiny. 

 

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Edited by Odyssey
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This setup sends goosebumps up my spine. The power and the glory this amp exhibit. I have a hard time deciding which I prefer more - Sword or Destiny. All this listening with LCD4.

 

 

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So I just did a few hour comparison of my McChanson 300b vs my Line Magnetic 300b. What struck me was how much louder the McChanson was. Level matching my source was around 40% for the McChanson and 60% for the LM with both amps dials around 95% to max. 

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Posted (edited)

found a couple of photos of my ex McChanson... (a 12AU7 preamp, an 2W EL84/6P15P/SV83 headphone/integrated amp and also my current 6AS7 before the conversion when it was a power amp 2013...to work with the 12AU7 preamp (second photo in the background on the left). 

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Edited by dwbasement
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@Odyssey must luv his amp so much he's forgotten all about us here waiting for an update. Oih - get back here. We need to chat about tube rolling. Luke, I mean odyssey, it's your destiny. 😁

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Sorry but I've gone on a world promotion tour with Destiny ! 

 

Alright I'm back now to talk McChanson's amps again... in particularly Destiny. Something happen in the last week that made me question my sanity. Well I wanted to use direct heating rectifiers (274b etc) in Destiny as well as indirect heating rectifiers (GZ34 etc). So Eric suggested that I take the amp back to him for an experimentation. Change the 47 uf to 4.7 uf. Don't ask me what the hell is that. I leave that for @xlr8or to explain haha ! This change will lower the B+... 🙄 ... again don't ask me what the hell is that... I will leave that to xlr8or to explain.... btw can you get an easier name to type? 😁

 

Anyhoo, after the cosmetic surgery Destiny has lost power ! From Maclaren V12 to Toyota 4 cylinders. OMG. So back it goes to Eric for reverse engineering to back to square one. Now it's back to 47 uf and Destiny drives my Axis LS88 to astonishing levels with poise and control. Such a lovely sounding and singing amp... I mean it makes my speakers and my HiFiMan He1000se and my Audeze LCD4 sound super sexy !

 

Now I could have just post this picture and not have to write all that and it would have been self explanatory but I am back ! ... like Arnie says.

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Eric has also loan me his personal KT150 amp that can roll KT88. KT77, KT66, EL34, 6L6, 6L6GC, 6L6G, 6L6GA, 6550, 807, EL39, EL12 spez ...... someone please stop my keyboard from typing !!!

 

Love this amp ! Sound is a lot tighter than Destiny. Eric type Amy instead of Amp... so I shall call her Amy which is a nice name ! Anyhoo, I run Amy with my speakers and my headphones with speaker taps headphone cables and it is intoxicating good like good whiskey !

 

Again I could have post a picture instead of writing all that.....

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Amy sound so good in my rack. I'm reluctant to return it to Eric !!! It's using Psvane Classic Mkii KT88 now, courtesy of @BlueOceanBoy my best fiend. 👍

 

This gets louder than Destiny... meaning it's more powerfuuuuuuul.

 

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Posted (edited)

The 47uF power filtration caps are suitable for GZ34/5AR4 use but not for 5R4GY, 5U4G, U52 or 274B use. For the latter rectifiers you need the 4.7uF power filtration caps. The others are too high in value and will eventually lead to arcing of the rectifier. By the way tube rectifiers last for decades, if run at their right capacitance values.

 

With Eric's designs it's best to go with his own tastes. I have his prototype 12AU7/12AX7 preamp with phono stage. I can see he hacked the circuit topology a few times. He tried for SRPP first and then went to a single line design. It's a much better design to my ears. It sounds incredible and also a lot louder. 👍

Edited by xlr8or
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8 hours ago, xlr8or said:

The 47uF power filtration caps are suitable for GZ34/5AR4 use but not for 5R4GY, 5U4G, U52 or 274B use. For the latter rectifiers you need the 4.7uF power filtration caps. The others are too high in value and will eventually lead to arcing of the rectifier. By the way tube rectifiers last for decades, if run at their right capacitance values.

 

With Eric's designs it's best to go with his own tastes. I have his prototype 12AU7/12AX7 preamp with phono stage. I can see he hacked several times. He tried for SRPP design first and then went to a single line design. It's a much better design to my ears. It sounds incredible and also louder. 👍

Good of you to point that out. It is so common for tube rollers (rectifier in this case) to overlook the fact that not all rectifier tubes can handle filling up big buckets (so to speak) without working themselves to a premature death.

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Ladies and gentle...... this is the best tube Brimar 6L6GA

 

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Tonight it's time to celebrate !

 

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Posted (edited)

You need to hear LCD4 with Amy and Destiny. This is end game whatever that means and I had too many whiskey now.

 

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Edited by Odyssey
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9 hours ago, Gryffles said:

@Odyssey see if you can try the Mullard CV1947 😊

 

That's a EL37 equivalent and I've no doubt it can be used and it will sound lovely. When I get 'Odyssey' (a custom amp that will be built for me in Sweden) I will try Mullard EL37 and a whole range of other tubes.

 

I also have Telefunken EL12 spez and EL39. These require adapters but the EL12 spez is really special. Many have claimed the EL39 sounded great so I bought a brand new pair - just waiting to use it.

 

I have GEC KT66 and Philip Miniwatt 6CA7 double 'O' getters but they are in my Canberra accommodation.  What a bummer. 🙂

 

There's also the Sylvania 807 (picture below) which I have with me here but I left the adapters in Canberra !

 

 

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Hey @Odyssey those Sylvania 807 bottles look absolutely magnificent!

Remind me in size of both the 274B's and 300B's...make for glorious glowing...viewing...listening?!? :) 

Where/when are you planning to put them in for a listen and look see?!?

Edit: adapters for the 807?!?! What exactly are they and how do they work?!?

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22 minutes ago, BLAH BLAH said:

Hey @Odyssey those Sylvania 807 bottles look absolutely magnificent!

Remind me in size of both the 274B's and 300B's...make for glorious glowing...viewing...listening?!? :) 

Where/when are you planning to put them in for a listen and look see?!?

Edit: adapters for the 807?!?! What exactly are they and how do they work?!?

 

When am I planning to put them in is a good question as I'm returning Eric's amp on Sat morning and the adapters are in Canberra. This is where you buy the adapters...

2pc Gold plated FU7 807 TO 6L6 Tube converter adapter | eBay

 

Make sure with your builder that your amp can use the 807 but I've tried it on my Elekit TU-8200 and it's a glorious tone.

 

I have 2 pairs bought NOS NIB. A Radiotron 807 and a Sylvania 807. These sound as good if not better than the 6L6.

 

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These are the EL39 that I've bought but haven't tested in any amps yet. My Swedish amp builder told me they are ok to be used in the custom amp I'm getting. I'm surprised that I can still get them NOS and NIB from - La Radiotechnique EL39 NOS Valve Tubes | eBay

 

Adapters are 1pc Gold plated 4654K EL39 TO EL34 tube converter adapter | eBay

 

 

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However these Telefunken EL12 spez are the ones I'm most excited about. They are absolutely gorgeous sounding in the Elekit TU-8200. I think we need another thread to talk about tube amps and tubes in general as we seem to be going away from solely McChanson's amps.

 

These EL12 spez will again be featured prominently in my forthcoming Swedish amp to be named 'Odyssey' 🙂

 

 

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These GEC KT66 are smooth and refined. Odyssey will sound great with all these tubes I’m using with it.

 

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The 8200 strikes me as a pretty sweet amp to be able to roll such a variety of tubes like that 👍👍

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12 minutes ago, crtexcnndrm99 said:

The 8200 strikes me as a pretty sweet amp to be able to roll such a variety of tubes like that 👍👍

 

It is but it's also my Waterloo because that set me on the course to get Odyssey.... 

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Posted (edited)

Mullard Blackburn 807's sound totally awesome. 👍👍👍

 

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Edited by xlr8or
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Posted (edited)

More sexy tubes to try are the STC 5B/254M's and STC 5B/255M's with tube adapters.

 

Edit: @Odyssey how about these:

 

https://www.ebay.com.au/itm/Matched-Pair-807-Used-Black-Plate-Cossor-UK-Valve-Tubes-AVS4-/383711651147

 

Second edit: For the 5B/254M's these 2 with double rectangular getters would make a lovely pair:

 

https://www.ebay.com.au/itm/STC-5B-254M-CV428-Valve-Tube-Used-good-quality-British-/333807020210

 

https://www.ebay.com.au/itm/5B-254M-CV428-STC-NOS-BOXED-CHEAPEST-ON-EBAY-BY-FAR-/333952204711

 

KB and KJ date codes = February 1955 and September 1955.

Edited by xlr8or
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Very interesting those STC 5B/254M. Thanks for the info. The base reminds me of my Siemens c3g.

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This is a pair of lightly used Tung Sol 6550 1960s that I will be buying next for Odyssey.

 

 

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Chasing NOS tubes is an expensive hobby. This pair will set back my timeframe for upgrading the 300b tubes. Either I upgrade my 300b tubes first then double back for these.

 

 

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Posted (edited)

I'm not sure if you are all aware but there were at least 3 different versions of the back plates made from 1955 to 1960. Version 1 had a single top getter only. Version 2 had 2 top D getters. Version 3 had three getters (single top D getter and 2 side D getters). I will post some reference photos showing the 3 different versions. I luv the version 1 very very much. 😍

 

Edit: Here are some photos of version 3:

 

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Version 1:

 

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To be continued ...

Edited by xlr8or
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3 getters!

 

That has to be three times as good!

 

Or three times as cool at least 😆

 

So which are the best sounding of the three @xlr8or

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6 hours ago, xlr8or said:

I'm not sure if you are all aware but there were at least 3 different versions of the back plates made from 1955 to 1960. Version 1 had a single top getter only. Version 2 had 2 top D getters. Version 3 had three getters (single top D getter and 2 side D getters).

As with EL34, there are variations. With EL34, there are single O getter, double O getters and double D getters. I have the Philip Miniwatt double O getters.

 

 I don’t think I will have all the different versions. Just one pair of NOS Tung Sol 6550 will do. To compare with it’s British counterpart the GEC KT88.

 

These bigger tubes captivates me more than the 6as7g / 6080.

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15 hours ago, xlr8or said:

I'm not sure if you are all aware but there were at least 3 different versions of the back plates made from 1955 to 1960. Version 1 had a single top getter only. Version 2 had 2 top D getters. Version 3 had three getters (single top D getter and 2 side D getters). I will post some reference photos showing the 3 different versions. I luv the version 1 very very much.

 

Did you have the triple D getters? Those are very rare according to my guru supplier. I just have confirmation from him that the pair I'm getting have a O getter on top and 2 side O getters.

 

 

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Posted (edited)

Yes - I have all versions of the Tung-Sol 6550's including the ones you have, which are in fact Version 4 black plates introduced in 1960 for about 9 months before they transferred the exact same internal construction design across to solid grey plates until the end of 1962. My favourites though are Version 1's from the mid 1950's with the single square getter at the top. Regardless of which version you have they all sound totally awesome right through to the 3 hole perforated grey plate version made from 1963 and onwards.

 

Here is one of my many PP power amps fitted with a quad set from 1966. 🙏

 

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Edited by xlr8or
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Posted (edited)

Yes and the TT21, which is my favourite GEC KT88. I like the Tung-Sol black plates more though.

 

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Edited by xlr8or
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