[shellylh]

Skylab:

Which CV1988 are you talking about (or are they all very good)?

Also, did anyone else ever make CV1988? For example, is this made by Brimar? It looks similar to the above pictures but not exactly.

2Pcs. NOS CV1988 6SN7GTY = 6SN7GT 5692 (CV181) - eBay (item 290303213137 end time Apr-14-09 19:04:31 PDT)

 

[Koolind]

My CV1988's looks like the ones at the first picture, but with brown base (they might also be a bit brown at the picture though?)
They have the same white printing and black glass and are rather bass-heavy with sweet mids..

 

[Oskari]

Quote:

Originally Posted by shellylh /img/forum/go_quote.gif 2Pcs. NOS CV1988 6SN7GTY = 6SN7GT 5692 (CV181) - eBay (item 290303213137 end time Apr-14-09 19:04:31 PDT)

Those would seem to be '72 STC/Brimars. You can decode the markings on the CVs with the help of the CV valves page.

Overall, one would expect the designs to change over the years, at least in details.

 

[Skylab]

Quote:

Originally Posted by Koolind /img/forum/go_quote.gif My CV1988's looks like the ones at the first picture, but with brown base (they might also be a bit brown at the picture though?) They have the same white printing and black glass and are rather bass-heavy with sweet mids..

Same here - mine are identical to the first ones, but brown base. Oh, those mids

 

[Koolind]

Skylab - I see that you also have a pair of K340's ?.. Do you ever use them, and do you have any tube-preferences for using them with the 336?

 

[Skylab]

I don't use them with the DV336 - it's not the best match of all of the amps I have. I tend to use them with the Ming-Da, which is 6BQ5/EL-84 based.

I have used them briefly with the 336SE and it sounded pretty good with the tubes I have in it currently.

 

[BIG POPPA]

Won a Tung Sol 6080 last night around 10 pm and I find it in my mailbox today in a ziplock bag.Haven't had anything delivered in a ziplock bag since college

So glad my mailman is used all my purchases. We have been talking tubes this last week.

 

[BIG POPPA]

OK, Anything by Electro-Harmonix is like ........ Skylab was right on this. Anyway the hum is very noticeabe. Even after replacing the IEC with Furutech FI-03 Gold IEC Inlet & Fuse Holder by Revolution Power and a ISOCLEAN POWER Fuse - Small 5x20mm by Revolution Power I like tweeking like anyone else, but this is a little annoying to me.

 

[Oskari]

Quote:

Originally Posted by BIG POPPA /img/forum/go_quote.gif Anyway the hum is very noticeabe.

http://www.head-fi.org/forums/f5/dv-...tz-mod-353079/

 

[Skylab]

That is a good idea w/r/t hum, but it won't make the E-H 6SN7 sound good

 

[BIG POPPA]

I like the CBS Hytron 6sn7gta/ RCA 6080 combo at the moment. I have some Sylvania 6sn7's coming in a few days to play with.

 

[Koolind]

Added a Tung-sol 5998, a RCA 6as7g black plate and a Dumont-branded Tung-sol 6sn7gt "mouse ear"..
The 5998 sounds good with great bass impact and bass quantity. However i think that the RCA's have better mids in general.. I cant hear much difference between the grey plates and the black plates RCA though. One has top getter, the other bottom getter.
The mouse ear sounds good though.. But it's humming.. I might have to do the fitz-mod since i have both the mouse ear and the ken-rad V231 black glass that hums.. The sound though in both tubes are great..

 

[shellylh]

I bought a pair of RCA grey glass VT-231 for my WA5 LE. I decided to try the in the DV 336SE to see how they sound and if they would hum. In fact, neither of them hum (and of course they sound great)! Just thought I would let others know in case they came across a good buy on one. On the other hand, though, the RCA grey glass 6sn7gt that I used to have but sold with my SP amp, did hum.

 

[Skylab]

I finally got around to trying an ECC32 in the 336SE. I took my 5998 *out* first though, and put a 6AS7G in, because it seems to me that asking the 336 to provide both the extra current a 5998 demands AND the extra current an ECC21 demands at the same time isn't a good idea.

So with a Tung-Sol 6AS7G and a Mullard ECC32, the DV336SE sounds PHENOMENAL. No doubt better than with any 6SN7 I have used in it. Yes, it seems folly to use a $200 tube in a $400 amp in some ways, but it sure sounds nice

 

[BobinNJ]

Hi all, I just started dipping my toe in the tube pond. I ordered a DV 336SE from Head Direct; which will be my first tube equipment . Finding the discussion very interesting, but a bit confusing as well. Should I start looking for replacement tubes now, or run the stock tubes till the unit has had it's break in time? Actually, does the amp have a break in time? Where's a good place to shop for new tubes? I know it's been asked, but since I'm such a noob, I wanted to make sure I wasn't missing something obvious.