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Headamp Blue Hawaii Special Edition - Page 322

post #4816 of 6658
Quote:
Originally Posted by dailydoseofdaly View Post

Quote:
Originally Posted by David1961 View Post

I've heard someone else's 007mk1's with my BHSE, and I was regretting letting my 007's go, ( headphones only ) but since using the PH tubes with my BHSE driving my 009's, I no longer think about the 007's.

I switched from the sed to the ph's in my kgbh nearly a month ago now and the mk1's seem to really sound great with the new tubes as well my 009. The tubes do appear to have more detail than the sed, however I'm not noticing a treble roll off, which vary well be system dependent and suits me fine because that was my one concern with adding the ph's regarding the o2

Hi dailydoseofdaly,

I haven't heard the 007's with my BHSE while using the PH tubes, but a head-fier is visiting my place in April to have a listen to my 009 / BHSE, in which I believe he's bringing his 007's.
Before using the PH tubes, I was using SED's, and like I've said in some of my posts, while using the SED's and stock Mullard's, the highs sounded shrilling from my 009 / BHSE, but with the PH's there's no such problem and my 009 / BHSE is easily the best combo I've ever heard.
post #4817 of 6658
When I did the tube changing and biasing with my BHSE, I just followed the video Justin did which can be found on YouTube. After watching that video the tube biasing was very easy so I'd like to thank Justin for doing that video.
post #4818 of 6658

Thanks again David and Phil!

I will try the tubes with my 007t and 009s and see what happens and rebias somehow if I think I need it.

post #4819 of 6658
The best advice I can give you rgs9200m, is order the BHSE and when you have it, sell your Stax amp.
Then if you'll be using the 009's with the BHSE, get the Psvane EL34PH tubes.
post #4820 of 6658
If the tubes are within the same spec as the tubes original to the Stax it is unlikely that you will need to do anything. It gets tricky when you sub in different tubes that might "seem" identical - here you are effectively making electrical changes to the amp, which I would guess is not the best idea. But keep in mind when you make adjustments to the amp, you are not actually "biasing the tubes". All you can do, without changing the circuit, is adjust the balance and offset so that they are within acceptable limits. Sometimes an amp is and sometimes it isn't. If it isn't, you will normally get some noise, but not always. The only way to check is with a volt meter, and the process has been set out in these threads numerous times.
post #4821 of 6658

Thanks George. So would the RCA clear top  6FQ7 , 6CG7 tubes I see at Tube Depot be the same spec as the stock Stax tubes?

(Stax recommended these to me on the phone.)

 

tubedepot.com/products/6cg7-6fq7-rca-clear-top

post #4822 of 6658
post #4823 of 6658
Quote:
Originally Posted by rgs9200m View Post

Thanks George. So would the RCA clear top  6FQ7 , 6CG7 tubes I see at Tube Depot be the same spec as the stock Stax tubes?



(Stax recommended these to me on the phone.)



 



tubedepot.com/products/6cg7-6fq7-rca-clear-top


 



I am unfortunately of no help in that department.
post #4824 of 6658

I collected some information about tube amplifier bias adjustment in a post on the Norwegian forum Hifisentralen: "Biasjustering av rørforsterkere for elektrostathodetelefoner" including links to relevant Head-Fi threads and posts and YouTube videos. Google Translate from Norwegian to English: "Biasjustering of tube amplifiers for electrostatic headphones" (see post #359).

 

Head-Fi.org:

 

 

YouTube:

 

 

 

 

post #4825 of 6658

Good stuff. Thanks for all the help.

I like my 009s a lot but I've done a lot to perfect my stable of dynamics I like with my pinnacle amp, so I just get by with my 007t/ii when I am in the mood to 

have my 009s tell it like it is (and I hope I can handle the truth when I listen to them).

(Like I said sometime earlier, I think the PSvane tube is the pick of the litter for the Pinnacle.)


Edited by rgs9200m - 3/24/14 at 5:01pm
post #4826 of 6658

If you're aiming to keep the 007/t, I read somewhere that Justin can do an upgrade which is much more significant than any tube swap. 

I don't know how much this would cost or, considering his BHSE batch work, how long it would take.

post #4827 of 6658

Thanks for that. I just hate to bother Justin with something small because he seems overwhelmed with work.

post #4828 of 6658
Quote:
Originally Posted by rgs9200m View Post
 

Thanks for that. I just hate to bother Justin with something small because he seems overwhelmed with work.

 

The mod has also been detailed online so you could probably do it yourself as well

post #4829 of 6658
Quote:
Originally Posted by Rico613 View Post

I like a 15' length on my headphone cables, so I got the Stax extension for the 009s

Wouldn't do that -- you're degrading the sound and possibly negating the benefits of better cables upstream.
post #4830 of 6658
Quote:
Originally Posted by Surge74 View Post


Wouldn't do that -- you're degrading the sound and possibly negating the benefits of better cables upstream.

This is an incorrect and misleading statement. Stax manufactures extension cables for a reason

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