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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 395

post #5911 of 10578
Quote:
Originally Posted by mordy View Post
 

Ditto, keep up the good work! BTW, what happened to the protective circuit for DC coupled amps from the British designer?

This was the last communication I got from him at the end of March.

 

Quote:
Looking forward to seeing the next review on the tube amp. When I get in the new house I will finally send you the LDP that I have all the parts for..! and an amplifier. 

 

Just waiting for him to get settled down in his new house. :D

post #5912 of 10578

Hey so one of my tubes split open on the bottom.  What could have caused this?  It was a fairly old tube (1945)  but it worked fine (was kind of microphonic though)  so I swapped it out and noticed the split.  

post #5913 of 10578
Quote:
Originally Posted by maxipad View Post
 

Hey so one of my tubes split open on the bottom.  What could have caused this?  It was a fairly old tube (1945)  but it worked fine (was kind of microphonic though)  so I swapped it out and noticed the split.  

 

We need a bit more information.... For example, what kind of tube?

post #5914 of 10578
Quote:
Originally Posted by gibosi View Post
 

 

We need a bit more information.... For example, what kind of tube?

JHY-6AK5 Hytron 

post #5915 of 10578
Quote:
Originally Posted by maxipad View Post
 

JHY-6AK5 Hytron 

 

OK.... An all-glass 7-pin miniature and the glass base cracked... You have my condolences... :(

 

But as you pointed out, it is close to 70 years old.  And while this doesn't happen everyday, it is not all that unusual. Whenever I find a tube I really like, I always try to get a couple extras, because it is impossible to predict if and when one might give up the ghost....

post #5916 of 10578
Quote:
Originally Posted by gibosi View Post
 

 

OK.... An all-glass 7-pin miniature and the glass base cracked... You have my condolences... :(

 

But as you pointed out, it is close to 70 years old.  And while this doesn't happen everyday, it is not all that unusual. Whenever I find a tube I really like, I always try to get a couple extras, because it is impossible to predict if and when one might give up the ghost....

Haha yeah, I mostly figured it was because it was so old.  I got probably 6mo use out of them as well, so it wasn't like it split right after I got it either.  I was honestly kind of proud that I've finally listened to my amp enough to have a tube go bad (then again using one from 1945 might have been cheating a little).  I've already moved on to some 1956 6AK5W Tung-Sol tubes (turns out I have a bunch of them laying around!) and I'm happy as can be.    Honestly when all else fails I just go back to the Voshkods since they sound really... really... really good.  

post #5917 of 10578

Update on the Psvane CV181-T II/7N7 (short-bottle) power combo...

 

Now with the adapters well run-in, they are still defying all previous thoughts on "mix and match" (when using just 1 tube per channel).

A happier marriage you could not hope for - there is no clash/imbalance/over-dominance whatsoever...so WHY IS THIS? :

To ascertain how much may be down to my "unbalanced" ears, I swapped L to R and...no noticeable (negative) difference. So, thankfully, my less-than-perfect right ear is obviously not impeding too much on my listening pleasure...nice to know!

 

So what now?...A clue came from a derogatory comment on the 6SN7 rolling thread, viz the Psvane being "girlie". This I suspect came from a "macho man" - anything that can surpass a 6N30P-DR is no slouch in my book. What I think is a more accurate description is a well-rounded and balanced presentation, not "in your face" or overtly dramatic, but more delicate/subtle. In this respect I suppose one could actually say (Old World!) "feminine". Now most of the time I personally find this trait much more attractive (am no headbanger, me!), but sometimes a bit more "masculinity" can of course bring another dimension - power (unless the gal is an 'Amazonian!'). This, I am beginning to think, could well be one of the main reasons for my combo's successful pairing...yin and yang, if you will. With neither being dominant, but the two creating the whole...

 

Plus, of course, a great deal of luck in there being no major clashes technically/electrically!.

 

Well, that's my take on this "conundrum" anyway. Whatever, I am now getting the most satisfying sound that has ever emanated from this humble machine - no matter what the purists may say...but of course no-one on this planet is going to have the exact same set-up as mine, so perhaps very few people are actually going to be as lucky in their findings as I have been. But I am sure I cannot be the only one for this phenomenon to "come together"...or am I?! :wink_face: 

 

Edit...a couple of pics...

 


Edited by hypnos1 - 4/21/14 at 9:14am
post #5918 of 10578
Quote:
Originally Posted by kvtaco17 View Post
 

 

and on top of that I'll be testing 6f8g's soon!

 

Can't wait to get your feedback on the 6F8g - looks like many prefer that over the 6SN7...but what on earth is going on with the price of these things? Perhaps they became TOO popular, lol?!

post #5919 of 10578
Just waiting on the adapter to come...
post #5920 of 10578
Quote:
Originally Posted by hypnos1 View Post
 

 

Can't wait to get your feedback on the 6F8g - looks like many prefer that over the 6SN7...but what on earth is going on with the price of these things? Perhaps they became TOO popular, lol?!

 

Yeah I considered testing them, but couldn't justify the price.

 

If I could find a respectable pair for >$60 i'd give it a shot, but you would still need adapters.

post #5921 of 10578
Quote:
Originally Posted by mab1376 View Post
 

 

Yeah I considered testing them, but couldn't justify the price.

 

If I could find a respectable pair for >$60 i'd give it a shot, but you would still need adapters.

 

Hi mab.

 

As has been mentioned elsewhere, I am sure dealers keep an eye on us all in these forums with a "view to a kill"...very murky goings-on indeed!...Or am I just being my old cynical self?

 

Ah well, if our LDs can continue to be extra versatile, perhaps the 6C8g might be a better option?...depending on who's watching us! They appear to be just as good as the 6F8g, but much cheaper (a nice-looking pair went for $24 earlier today). Would need to have a close look at the electrical differences though....

 

Will certainly be interesting to hear our colleague's findings however...

post #5922 of 10578
Quote:
Originally Posted by hypnos1 View Post
 

 

Hi mab.

 

As has been mentioned elsewhere, I am sure dealers keep an eye on us all in these forums with a "view to a kill"...very murky goings-on indeed!...Or am I just being my old cynical self?

 

Ah well, if our LDs can continue to be extra versatile, perhaps the 6C8g might be a better option?...depending on who's watching us! They appear to be just as good as the 6F8g, but much cheaper (a nice-looking pair went for $24 earlier today). Would need to have a close look at the electrical differences though....

 

Will certainly be interesting to hear our colleague's findings however...

 

Ha interesting perspective. I'm sure they're all watching...

 

I'll definitely consider the 6C8G if i can confirm using the 6F8G - 6SN7 adapter so i can use them as power tubes.

 

The Tung Sol VT-99 (6F8G) seems to be cream of the crop going for about $250.

post #5923 of 10578

Further to my previous post re power tube combo, I can confirm that they are definitely performing better than either pair of Psvane or VT231.

 

The added "masculinity" of dynamism is most suredly there...I suppose I could now term my rig "Amazonian gal", or LD Xena (Warrior Princess?)!!

 

Enough of analogy...back to some "proper" tube-speak (mind you, I feel that "analogy" can often convey much more). What seems to have been addressed is the slight veiling of the C3gS's wonderful clear detail resolution and "airiness" when partnered with the VT231s. And since this is (one of) the C3g's truly magical qualities, it is a real joy to have it back PLUS the extra dynamism and mids detail.

 

I am now utterly convinced that with the C3Gs in the driver's seat of the MKIV SE (and other models it looks like), the sky's the limit! All that's needed is a fatter wallet, unfortunately...especially now the prices of what we could yet try have gone ballistic! :(

 

 

ps. The dreaded 6AS7s have arrived, but not yet the 8A regulator...so the fateful day will have to wait until after the hols...:confused_face_2:

 

BFN

post #5924 of 10578
Quote:
Originally Posted by hypnos1 View Post
 

Ah well, if our LDs can continue to be extra versatile, perhaps the 6C8g might be a better option?...depending on who's watching us! They appear to be just as good as the 6F8g, but much cheaper (a nice-looking pair went for $24 earlier today). Would need to have a close look at the electrical differences though....

 

 

The 6C8G has .3 amp heaters, and appears to be somewhat similar to a 6SL7 or 7AF7. As usual, since I have no power tubes, I am going on gut feeling here, but I suspect that like the 6DJ8, this tube just doesn't have enough current, or "power" if you will, to do well as an output tube. However, as a driver tube it should be perfectly fine. I have run the 7AF7 as a driver, and found it to be a very nice tube. As the 6D8G has the same pin-out as the 6F8G, the same adapter can be used.

post #5925 of 10578
Quote:
Originally Posted by mab1376 View Post

 

The Tung Sol VT-99 (6F8G) seems to be cream of the crop going for about $250.

 

The National Unions also seem to get a lot of love.

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