According to 2 famous and reliable Tube sellers

"The 6H30 tube type is generally not compatible with 6922 and ECC88 tube types."

http://thetubestore.com/6h30types.html

And also over here,

"This tube is not a replacement for 6922 or any other tube type."

http://www.upscaleaudio.com/6h30pi-gold-pin/

Hi setamp,

In general, for tube amps, you can use an alternative tube if the alternative tube has a lower filament current than the original stock tube as was specified in the original tube amp design.

For example, if you take the case of the CSP2+ which was originally designed for the 6N1P tubes,  the filament current of the 6N1P is greater than the alternative European and US ECC88 family of tubes, this is why ECC88, E88CC and 7308, etc can be used instead of the 6N1P.

For the Dodd tube amp, it was originally designed for the 6H30 tube. The 6H30 tube has a larger filament current than the 6N1P tube.

You can compare the specs using the following links.

6N1P : Filament Current of (MIN) 0.55 to 0.65 (MAX) A
http://www.russiantubes.com/prop.php?t=12&p=194

versus

6H30P : Filament Current of (MIN) 0.725 to 0.9 A (MAX)
http://www.russiantubes.com/prop.php?t=12&p=233

In such cases, it is therefore generally not advisable to use the 6H30P tube in a CSP2+.

Unless you don't mind taking the risk, it is best to check with Steve before you pop in that 6H30 tube.

BTW, this is the technical reasoning behind what Kevin Deal was trying to say at his website.
http://www.upscaleaudio.com/pages/6922-Tube-Types.html

"Do not use a 6N1P in a 6922 position. But you can almost always use a 6922 in a 6N1P position in products like Peachtree Audio and others.

Do not use a 6H30. The 6H30 is a completely different tube. You also cannot use a 6922 in a 6H30 position except for a couple rare preamps, check with the manufacturer."  

For those who are lusting after the Lorenz but can't get hold of them,
a suitable and worthy replacement would be the normal Amperex (*USA) 6922 which is cheap and readily available.

I finally carried out an audio shootout between the Pinched Waist 6922 Amperex (* USA) versus my stash of Lorenz tubes.

The PW 6922 has the treble euphonic extension of the Lorenz CCa (2 Mica) and the Midrange euphony of the Lorenz E88CC (2 Mica).
The bottom end of the PW 6922 has punch but loses out slightly to the Lorenz PCC88 (2 Mica).

Another way of looking at the PW 6922 is that it is similar to a Lorenz PCC88 (3 Mica) or Lorenz 6922 (3 Mica) in being balanced sonically.
However, the PW 6922 still does sound slightly better at both the Treble and the Midrange.
 
The normal Amperex 6922s themselves are also almost as good (IMHO at least 90%) as pinched waist Amperex 6922s.
The usual drill about "D" getters and grey shields being better also apply as usual.
 
Epilogue or Prologue as the case may be. Joe was right!
IMHO, the Amperex PW 6922s are the King of the hill!

Lon great news! Looking forward to your review(s) out of the box and as it breaks in and makes friends with your Torii. I'm really enjoying my Artemis LA-1 per but I would like to try to get my CSP2 back in the chain.

Those N1P's sound great. I should try some although I presently have Amperex's 6922's, 6DJ8's, 7DJ8's, Edwisian 6922's, Mullard 6922's and some I'm sure I'm forgetting. Wouldn't mind finding some of those Lorenz's either but they're almost impossible to source.

I finally got down to rolling my NOS Matched Pair of Siemens E288CC (grey shields) tubes.

These tubes are considered to be a dark horse due to much bashing by Joe's tube lore. However they have earned much praise elsewhere too.

So the question to any tube roller would be, what do these sound like in the CSP2+???

When used as a preamp, the Siemens E288CC works great in the 2x output section.
Without any prolonged burn-in, the tubes are a sonic equivalent ( in my setup) to the Siemens 7308.
Since tubes will improve with use, I'd expect them to surpass the E188CC eventually.

According to the E288CC data sheet, the E288CC is supposed to have higher GM vs the "normal" 6DJ8/E88CC/E188CC.
When used as a preamp, what is interesting to me is that my volume knob choices were maintained at exactly the same level as before.
In the CSP2+, with the self - biasing design, I have found that I have gotten the same volume as the 6DJ8/E88CC/E188CC tubes.

When used as a headphone amp, however, I have to reduce the volume knob by 1 notch.

Some of my sonic impressions of the E288CC are :-

1. Bigger Sound stage vs 7308 Siemens
Live recordings make you feel like you are really there.

2. Crystal clear vocals like the Siemens CCA tubes - these are factory selected UBER tubes

3. Natural tonality - pianos sound like they are in the room

4. Transparency
I normally do not use my CSP2+ with my SE tube power amp because I can hear a slight sonic veil.
What I'd surprising here is that for once I can't detect any sonic veil!
For once I can have my cake and eat it coz the CSP2+ still adds a touch more of organic tube warmth and 3D holographic imaging to my set-up.

5. Treble
Hi frequencies are well rendered.
Cymbals have a nice sheen and sparkle.
Strings have "emotional" appeal with great tonal decay, ranks among the best tubes I have heard.

6. Bass
Above average.
Tight and not inadequate in any way.

My source : OPPO 95.
My other tubes are 1x Brimar 5R4GY RECTIFIER and 1x Amperex Pinched Waist 6922 *USA for the input section.
My headphones: Beyer T1.