Tube handling/designations

I just wash my hands first. DO make sure that if you get fingerprints on the tubes to wipe them off thoroughly. Washing tubes can be a problem since the paint usually washes off too...

I think you can use cv4004 also???
6922's are great tubes and easy to roll. Personally, I like Telefunken for any kind of tube, followed by Mullard and Amperex Bugle Boy/trumpeter(much better than the basic amperex). Golden Dragons are good, JAN can be good too.

Keep in mind that these will last 5000 to 10000 hours for good ones. So, to spend $100 for good ones vs $20 for Sovteks is worth the difference! You should be able to find nice pairs for $60 to $90/pr. Mint NOS Telefunkens will run more. The old tubes were made much better than some of today's junk like some russian and many of the chinese tubes.

Good sites to search for tube ideas:
Upscaleaudio.com
thetubestore.com
tubeworld.com pricey
tubesandmore.com
echohifi.com
jeffsoundvalues.com

Call BAT before you start sub'ing tubes. Most anything that takes 6DJ8's can take 6922/6h23's BUT not everything that takes 6922's can run 6DJ8's as effectively. They are not identical tubes. FWIW.

Thanks for the info guys.I've got one more though.Do I have to replace all of them to get a change in sound and do they all have to be the same brand?

Your best bet is to replace all the stock tubes in your Bat VK 30. Also the 6922 tesla,s are a upgrade over the Sovteks but I recommend that you consider amprex bugle boys as a start in your quest for a bigger improvement in presatation and soundstage. Here is some additional info regarding these 6 volt 9 pin twin triode tubes...6dj8=ecc88 6922=e88cc 7308=e188cc tube(6dj8) cv2492=6922 and 7dj8=pcc88(a 7 volt tube that I have used with great sucess in my pre in leu of 6dj8's). Feel free to e-mail me in regards to extra quads of tubes that I have avaible from collection of slightly rolled tubes
Dennis

You do not need to use all the same brand and there are certain positions that will affect the sound more than others. The 7308s and also CCas are generally, but not universally, considered to be the best of the the 6DJ8/6922/E88CC/ECC88 family of tubes. Google Joe's tube lore to get info on the sonic differences btwn diff brands and members of the family. And also be aware that BAT products are not GENERALLY considered to be as susceptible to dramatic changes due to tube rolling. Also be careful of counterfeit and dramatically over-rated (meaning sold as NOS but barely functional) tubes on (Fl)ebay!! You should consider a tube tester and get return rights on tubes. A legit seller will provide that. Also talk to members Kalidekol and Jsautter for tube sales and good advice.