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Progress: PPX-3 Tube rolling pack - Page 3

post #31 of 162
The 6cg7 has a shield and it cant be a 6cg7 without the shield. The 6fq7 does not have the shield. The tube is the same otherwise. All of my tubes are marked 6cg7 or 6cg7/6fq7; so I dont have any pure 6fq7's to answer you. From my research the difference is debated. Some hear no difference while some insist the 6cg7 is better. I have not found anyone state they believe the 6fq7 is better in any of my reading. The important fact regarding the 6cg7 tube is that all of them I have tried are very good sounding tubes. I have tried the RCA clear top from Brazil std and cryo, GE JAN, GE std, Sylvania, Ei and EH (the only tube I dont like very well). I have some rayethon and golden dragon Chinese tubes I have yet to try.
post #32 of 162
Thread Starter 
Actually, that's what I thought until I found some 6CG7's that didn't have the electrostatic shield. So, it makes no sense at all anymore. I use 6FQ7 to refer to tubes without the shield, and 6CG7 to refer to tubes that have the shield (looks like a third plate). Some company somewhere screwed up the scheme, though.
post #33 of 162
Earl, Hirsch or anyone else for that matter, where are you getting all these tubes? Is it mainly eBay or do you have another source?

I don't tend to have alot of spare cash so I'm a bit reluctant to take chances on eBay auctions that may or may not have some gems. I personally would rather pay a little more to get tubes from a reliable source that have been tested and matched.
post #34 of 162
Quote:
Originally Posted by Hirsch
Actually, that's what I thought until I found some 6CG7's that didn't have the electrostatic shield. So, it makes no sense at all anymore. I use 6FQ7 to refer to tubes without the shield, and 6CG7 to refer to tubes that have the shield (looks like a third plate). Some company somewhere screwed up the scheme, though.
That doesnt make sense. By the way, I can contribute three rayethons and three Chinese golden dragons. Hirsch, I will mail them to you to test to be sure the tubes are ok; if your interested. I dont want anyone to put an unknown tube in their amp and have problems. If you want to include them pm me your address and I will get them out.
post #35 of 162
Thread Starter 
SACD Lover is sending two trios of tubes, which will bring the pack to nine sets. Talk about sensory overload! So far, there are only six people who have confirmed an interest. So, I'll likely ship them all together, and let people have an extra week or so. It may take a few months to get to the last person on the list, but there will be all kinds of options to play with. If more people sign up, I'll break the tubes into two packs. I'll ship when the other tubes arrive and I've tested them.
post #36 of 162
Thread Starter 
Quote:
Originally Posted by elnero
Earl, Hirsch or anyone else for that matter, where are you getting all these tubes? Is it mainly eBay or do you have another source?
I buy a lot of tubes from eBay. However, I also bought a decent tester, which does very zealous job of weeding out questionable tubes (probably too zealous, but I'd rather be careful). One they pass electrical testing, I try them out in an amp, as time permits. This is the only way I know to catch microphonics, and a couple of other rare intermittent issues.
post #37 of 162
Thread Starter 
The pack will go out early this week, when SACD Lover's tubes arrive and are tested. If you want to sample these tubes, please follow instructions in this thread, and make sure I've got complete contact info. Also let me know any time constraints you're under, so I can try and time the pack so you get it when it's useful to you (no guarantees here). Interest remains light so far, but there are probably a couple more days to sign up.
post #38 of 162
The tubes are on their way. Have fun guys , and thanks Hirsch, this was a nice gesture.
post #39 of 162
This is really cool for you guys (Hirsh and sacd lover) to be willing to send out your tubes on months long journeys around North America. I'd participate but I've got a good number of tubes already (3 complete sets and 6 other individuals) and hearing any expensive NOS tubes that I'll want to seek out will have dire consequences for my wallet. My work schedule and my lack of a car also makes trips to the post office a not-so-reliable thing, and I don't want to hold up the tube package for anybody. There's not too many internet forums where people are willing to send around their expensive stuff to people they've never met, and not have to worry about anything happening to it. Definately says a lot about the members here
post #40 of 162
Thread Starter 
The list is small, but that's OK. There's still time to sign up if you want this to visit you. I've still got to work out the order that people will get it. Probably mailing is going to be one week from today (June 2).

The first person will get this case:



Which he can open to find full of tubes:



Unwrapped, there are 27 tubes:



This is a set of 6FQ7/6CG7's. On the right is a Golden Dragon. In the center is a Raytheon, and on the right is a Selectron. Note the similarity between the Raytheon and the Selectron. Both have short box plates, and are made in Japan.



On the left is a Sylvania 6CG7. It has the shield, and box plates. The GE tube in the middle has flat plates, while the Tung Sol on the right has box plates. Note the distinctive black shield on the Tung Sol.



There is an RCA cleartop 6FQ7/6CG7 on the left. Second from the left is an RCA black plate 6CG7. The next is a Mazda Brimar 6CG7 (only one of these is sent). Note the unusual short bottle and the very small flat plates. The final tube is a Selectron 6CG7 (only two sent) which is a long plate Japanese tube.



I think people will have fun sampling these. Many thanks to SACD Lover for filling out the pack. It's not too late to sign up, if you want to give these a try. If enough people sign up, I'll create two packs that will travel in different paths.
post #41 of 162
I request all those who receive this pack to be systematic with it. Handle with care and PLEASE put a tube back into its original box without mixing things up!!

I cannot emphasize the "HANDLE WITH CARE" factor enough...quite a few people in line for these tubes and everyone should be able to share in the fun.

Cheers!
post #42 of 162
Wow, what a package. I might have to consider participating in this, the tube selections looks very tempting.

I have a tube labeled Dumont that looks extremely similar to the Tung-Sol tube shown, except it has black plates. The label on it has a 6 with the CG7 below it and then some pattern of dots. I notice the filament has a shield on it on one side. I also have a GE with the same labeling for the 6CG7 label (different dot pattern), but with grey flat plates and a flat shield and it has some small black shields curved around the filaments at the top with them opening towards the center. Looks quite similar to the GE shown in the pics. Mine has a round getter (couldn't see the getter in the pic). The Dumont has a date code of 61-22, the GE's is unreadable. Both sound excellent. The Dumont one is smooth with amazing bass, and the GE is a bit more lively (still smooth sounding) and also has great bass. Any idea of what those might be?
post #43 of 162
Very cool! Thanks Hirsch and sacdlover for putting this together. This will be my first mass tube rolling experience. Donovan, if there are tubes in the package that you want to try you might as well get in on it.
post #44 of 162
Thread Starter 
Quote:
Originally Posted by donovansmith
I have a tube labeled Dumont that looks extremely similar to the Tung-Sol tube shown, except it has black plates. The label on it has a 6 with the CG7 below it and then some pattern of dots. I notice the filament has a shield on it on one side. I also have a GE with the same labeling for the 6CG7 label (different dot pattern), but with grey flat plates and a flat shield and it has some small black shields curved around the filaments at the top with them opening towards the center.
The dot pattern is indicative of a tube that was made by GE. The Dumont may have been made for them by GE. While most GE tubes I've seen have flat plates, some may have had box plates. The black box plates should be nice. I'm trying to put together a trio of that kind of tube, but haven't matched them up yet. Some variants of the 6CG7 have a small wrap-around shield at the top of the filaments (some 6FQ7 types have this too). These were probably used at different times the tubes were manufactured. My general preference is for tubes that have that extra shielding at the top. In the pack, the set of GE tubes has filament shields, IIRC.
post #45 of 162
Thread Starter 
Quote:
Originally Posted by Canman
Very cool! Thanks Hirsch and sacdlover for putting this together. This will be my first mass tube rolling experience. Donovan, if there are tubes in the package that you want to try you might as well get in on it.
To get this started, I'll simply hand you the pack at the June 5 meet. You'll have close to two weeks with it. Then it needs to go to gsferrari on June 18 via Priority Mail. He will send it to Sir Poulet about two weeks later. I haven't worked out the schedule past that yet.
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