[3083joe]

In a recent test the 3DG4 beat all the 5volt rectifiers including the GZ37.  There is no reason the 3DG4 would have more hum
then a 5U4GB.

Glenn Need your help with the EL3N. Can you PM me?

 

[Rossliew]

Trying out a new tube combo :
 
Philips 5R4GYS/WE421A/B65 - doesn't sound as strong as the 3DG4/6336/Chrome Dome 6SN7 with my low Z cans (Oppo PM2 and SR-225e)..a bit disappointing really. Sounds a bit lean/thin, not much heft in the lower registers and sharp up top.
 
BUT, it sounds better with my Beyer T1 2nd gen....odd but i guess that's how it is with head-fi : all about the synergy i suppose. Need to try another rectifier, perhaps i will get a fuller sound.

 

[leftside]

My favorite combo is WE 421A/WE 274A/B65,  but different headphones and different head amp
 

 

[Rossliew]

  My favorite combo is WE 421A/WE 274A/B65,  but different headphones and different head amp
 

Nice rig!
 
I tried swapping rectifiers with the 3DG4 but it developed a slightly high pitched hum which was affecting my listening but more importantly, it didn't improve the lean sound, just maybe a smidgeon better.
 
Now using the USAF596 rectifier and i'm getting back that nice fuller sound and driving the PM2s pretty well. A smile has returned to my face I would say this combo has more sub-bass than mid-bass so it may not sound as fun but it can shake the drivers when the recording has the necessary sub-bass.

 

[2359glenn]

Got my adapters and 6BL7s...gosh the hum is strong..that dull droning. Making it quite unbearable really. Using 3 sylvanias and 3 GECs per side

What rectifier are you using there?

 

[gibosi]

My favorite combo at the moment... if you ask me next week, it will likely be different lol
 
A quad of 3-mica Sylvania 6BX7, GEC U18/20 and Lorenz C3g (1960's embossed flat-black cans). With the same rectifier and output tubes and a pair of Siemens C3g the presentation was just a bit too bright for my ears. Swapped in the slightly more laid-back Lorenz and the magic is back.
 

 

[Xcalibur255]

  Trying out a new tube combo :
 
Philips 5R4GYS/WE421A/B65 - doesn't sound as strong as the 3DG4/6336/Chrome Dome 6SN7 with my low Z cans (Oppo PM2 and SR-225e)..a bit disappointing really. Sounds a bit lean/thin, not much heft in the lower registers and sharp up top.
 
BUT, it sounds better with my Beyer T1 2nd gen....odd but i guess that's how it is with head-fi : all about the synergy i suppose. Need to try another rectifier, perhaps i will get a fuller sound.

5R4GY has a lot of voltage drop when used in this application, this is likely your culprit.  My love for this tube in the IHA-1 doesn't extend to use in the OTL sadly.  For low Z cans I have always found 3DG4 >> B65 >> 5998 to be as good as it gets for my ears.  For high Z I just replace the 5998s with 6520s instead.

 

[Rossliew]

What rectifier are you using there?

That was the WE422A...not a good pairing you reckon?

 

[Rossliew]

5R4GY has a lot of voltage drop when used in this application, this is likely your culprit.  My love for this tube in the IHA-1 doesn't extend to use in the OTL sadly.  For low Z cans I have always found 3DG4 >> B65 >> 5998 to be as good as it gets for my ears.  For high Z I just replace the 5998s with 6520s instead.

Ah thanks for the input there- much appreciated! I don't have 5998s yet but I could try the 6080s instead. Will do so tonight and let's see how it goes

 

[2359glenn]

 

What rectifier are you using there?

That was the WE422A...not a good pairing you reckon?

Do you have a adapter for it?  It needs a adapter or it might give a slight hum.

 

[Rossliew]

Do you have a adapter for it?  It needs a adapter or it might give a slight hum.

Yes it came with an adapter. I haven't gotten round to cleaning the pins of the 6bl7s though. The same hum was present wih the 3dg4 as well

 

[punit]

 I don't have 5998s yet but I could try the 6080s instead. 

The WE421A is an Uber 5998. You are running the WE421A with the 5998 / 6080 switch on 5998, right ?

 

[Rossliew]

The WE421A is an Uber 5998. You are running the WE421A with the 5998 / 6080 switch on 5998, right ?

Oh I have not tried the 6080 yet. Tonight will be the night and I will post impressions thereafter

 

[punit]

Oh I have not tried the 6080 yet. Tonight will be the night and I will post impressions thereafter

What i meant is - there is a switch at the back for switching between 5998 & 6080. The WE421A & 6336 are meant to be run with the switch on 5998 setting.

 

[Rossliew]

What i meant is - there is a switch at the back for switching between 5998 & 6080. The WE421A & 6336 are meant to be run with the switch on 5998 setting.

Yes understood. I used the 5998 switch.