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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 215

post #3211 of 10509
Quote:
Originally Posted by iworkjobs View Post

 
agree.I spending ~70$ on super-tubes, or am I selling the amp as it is, add another 70$ and buy the darkvoice 336 instead. 
33.gif
And then over the crackly loud speaker comes...
"Translation in aisle 3... Translation needed in aisle 3."  biggrin.gif  
Edited by TrollDragon - 10/2/13 at 7:17am
post #3212 of 10509

Hi Siles 1991,

 

Right now I am burning in the Sylvania 6AV6 box top tubes. These have a side getter and the getter flash on the side of the tube. In the beginning they were too harsh in the treble, but that has improved, and they now start to sound "right". Well, fantastic, super duper etc etc.

 

The way to find good deals is to look at Ebay often. Click on the drop down menu on the right that usually starts with Best Match. Choose Lowest price including shipping. Then scroll down; many times the price for a pair will be lower proportionately than buying individual tubes.

 

Look at the pictures using the magnifying feature. I have picked up good deals because the seller mislabeled his offer; i.e. Philco tubes that actually were Tung Sol on the pictures. If you cannot see if the tube has the box, ask the seller. It also helps to know the EIA codes when buying off brand tubes. Many times you can see the manufacturer's code on the tube. A pair of Stromberg Carlson tubes had the number 322 on them = Tung Sol. Philco and Zenith may have the number 274 = Sylvania.

 

Communication is the secret weapon for good deals. Some discount sellers appear many times. If you don't see what you want, ask the seller. Just be prepared for a wait or being ignored at times.

 

If the listing has a Best Offer feature, use it. Remember, the tubes the folks on this forum have found are not the mainstream tubes, and most likely are very little in demand (until somebody on the blog recommends them). Snagged some 6AV6 tubes recently very cheap. The seller wanted $14.99 for 6 tubes. I offered $6 and it was accepted. Then I offered $5 on another batch of 6 tubes, also accepted. Works out to $1.60 and $1.43/tube incl. shipping. (Wife: Why do you need so many tubes??? Answer: I am looking for Audio Perfection, and besides it was just $1/ tube!)

 

The 6HM5 Yugo tubes are listed for $6.99 each with free shipping. The seller can't see me blushing for making a shamelessly low offer of $4/tube. Look, you can always go back and pay full price. However, he states he has a box of 100, so maybe he is going to bite on my offer. A counter offer of $5/tube comes back. Fair enough, $10 instead of $14.

 

If the seller lists the tube for $2.49 and Best Offer is available, bid $1. Worked for me several times. Communicate: Tell the seller that you have this little amp that only can use pairs and ask him/her to look through the stock for a matched pair of of RCA or Sylvania with the same date codes. Just be forewarned that matching pairs means different things to different sellers. To some it means the same brand, to others the same tube designation even if the tubes are of different construction etc.

 

Don't expect five star service from the 99c stores. However, the rewards are there. My best 6TD6A tubes are Japanese Raytheon that cost 99c each - about $5.25 with shipping for the pair.

 

Giving away all my secrets - hope something helps. Good Luck!

post #3213 of 10509
Quote:
Originally Posted by mordy View Post
 

Giving away all my secrets - hope something helps. Good Luck!

Thanks mordy for allowing us to peek into the inner sanctum of a tube purchasing guru! :D

:beerchug:

post #3214 of 10509

Hi A11,

 

I have a pair of Sylvania 6BE6 that you inspired me to try. Which setting works best for you?

post #3215 of 10509

Hi TD,

 

The self imposed purchasing limits makes it more interesting to me; max $8/pair, or preferably $4/pair. Once in a while I break down and pay more.

 

Another not so secret weapon if a seller makes a mistake or a tube breaks in shipment because of poor packaging etc is the E-bay feedback system. Usually any mention of being unhappy and about negative feedback works like a charm to get a refund or replacement. Think twice before leaving negative feedback - it is very damaging to the seller.

 

If a seller asks you to do transactions outside E-bay - don't. You lose all the protection and it is against E-bay rules.

post #3216 of 10509
Quote:
Originally Posted by mordy View Post
 

Hi TD,

 

The self imposed purchasing limits makes it more interesting to me; max $8/pair, or preferably $4/pair. Once in a while I break down and pay more.

 

Another not so secret weapon if a seller makes a mistake or a tube breaks in shipment because of poor packaging etc is the E-bay feedback system. Usually any mention of being unhappy and about negative feedback works like a charm to get a refund or replacement. Think twice before leaving negative feedback - it is very damaging to the seller.

 

If a seller asks you to do transactions outside E-bay - don't. You lose all the protection and it is against E-bay rules.

 

More excellent tips!

Yes they all say to contact them for a fix first before any negative feedback is left, I'd really have to be screwed over or ripped off before I'd leave the negative.

 

The few I have delt with so far have been really accomodating, which I assume is the case for most large scale seller's.

post #3217 of 10509

Most sellers are decent and honest, but there are some strange people out there.

 

I bid a low ball offer on a lot of 14 tubes which the seller accepted. A day after the payment went through she contacted me that she cannot find the tubes and refunded the money.

 

Took a look at her negative feedback record. There was a similar story a few weeks before where she told the buyer that she had sold the item already to the chagrin of the buyer.

 

The seller was mad at me for leaving negative feedback and sent me an email wishing me all kind of things, which also is against Ebay rules, but I did not follow up on it.

 

Another seller sent me a nice pair of tubes at a good price. I asked if they had in stock another two pairs of similar tubes. The seller responded by billing me outside of Ebay at a higher price than the first pair. When I asked why I could not get the same price as the first pair they just stonewalled me and canceled the transaction and subsequently refused to sell me.

 

In general, most sellers are cooperative and honest, and the Ebay rules are very effective in securing good transactions.

post #3218 of 10509

Yes there are indeed a pile of strange folks on the internet...

 

The seller I picked up the GE6DT6A's from had the auction for 4, but after I won it he could only find 2. He offered me some other 6DTA6's which I probably should have taken but I asked him about subbing some 6CS6's which he also had on auction instead. He was more than happy to and it really didn't matter to me since I'm new to the rolling game and all the different tubes I can get my hands on the merrier.

post #3219 of 10509
Quote:
Originally Posted by TrollDragon View Post
 

Yes there are indeed a pile of strange folks on the internet...

 

The seller I picked up the GE6DT6A's from had the auction for 4, but after I won it he could only find 2. He offered me some other 6DTA6's which I probably should have taken but I asked him about subbing some 6CS6's which he also had on auction instead. He was more than happy to and it really didn't matter to me since I'm new to the rolling game and all the different tubes I can get my hands on the merrier.

 

Exactly at one point i wonder why i buy them to listen to or to collect either way its fun .

post #3220 of 10509

And speaking of fun got some 1960 JTL Tung-Sol 6BJ6 today nice and warm sounding compared to the Lorenz EBC91/6av6  alot less emphasis on highs probably not as detailed but a comfy sound i like them .

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post #3221 of 10509
Quote:
Originally Posted by mordy View Post
 

Hi All,

 

Some time back (page 199) I wrote that the 6DT6(A) tube makes me feel toe tapping good, and the 6AV6 tube makes me marvel at the holographic 3D super detailed sound stage with it's natural voice presentation and immediacy. Surely these two tubes are among the best we found to date (together with the 6AU6/8425 and 6AH6WA/6485 tubes.)

 

Since the advanced DIY soldering projects with wires and adapters are beyond my scope I decided to explore the 6AV6 tube family to see if we could find a tube that combines the awesome intellectual holographic presentation with the emotional impact of the 6DT6 tubes. It was pointed out that the 6AV6 tubes with a an inverted rectangular box on top of the top mica sounded excellent - without the box not the same results. I had five 6AV6 tubes on hand, but only two had the box on the top getter. Even though one was a Sylvania and one a Tung Sol, I burnt them in and was astounded at the sound.

 

Found a lot of six 6AV6 tubes for cheap ($1.60 each incl shipping). As Providence had it, all six had the box, and in this lot I also found the exact mate to both the Sylvania and the Tung Sol tubes! However, one tube (GE) broke in shipping.

 

Here are two pictures of the rectangular box on the top mica. Portions of the glass envelope of the tube have been removed for clarity by the USPS for your viewing pleasure. On its own, my camera decided on the sepia color, no doubt to impart a turn of the century flavor.

 

 

So far, three types have been auditioned: RCA, Sylvania and Tung Sol. They all sound great, with the nod going to the RCA for bringing in more of the emotional (toe tapping impact). The entire sound range is extremely well balanced with delicious detail and sound stage.

 

I highly recommend getting a pair of any of these 6AV6 tubes with the box on the top mica. Snip off pins 5 and 6, put a piece of electric tape on the stubs, and set the LD on the EF92 setting.

 

WARNING: The sound is so addictive that you will find it hard to stop listening and going to sleep regular time! (Ouch! Almost 12:30 am, and I have to get up at six!)

 

Finding a ton of side and halo getters... I did find 2 GE's with the box/rectangle. Really still looking for a few more sets... (RCA's)

 

Also had another tube die today... that's 3 in 2 days... Kinda lucky I never sold that tube package... a lot of my extra's and doubles were in there lol

post #3222 of 10509

Hi Mikelap,

 

The plot thickens:

 

First of all, I never heard of 6BJ6. Checked my copy of the page 77 list - not there. Went back to the page on the computer. Yep, it is there now with a note that it has not been tested. Are you the first one?

 

Next: The box says JTL which means Tung Sol. The tube on the picture says JHS which means Sylvania, which is also printed on the tube. Then the box says 188 after the number 5960. 188 is GE.

 

A triple whammy? Tripolar?

 

In the Hi Fi world there are two categories of people: Those who like the equipment and those who like the sound. I guess most people on this forum are a combination of both. First I was happy with M8100. Then I was happy with 6J5. Then I was happy with 6AU6/4825. Then I was happy with 6AH6WA. Then I was happy with the EH90/6CS6. Then I was happy with 6DT6. Now I am happy with 6AV6.

 

Cannot go back to the first two, but I could live with the others  on my list. Who knows what the next favorite is going to be? I don't really collect tubes, but am searching for the one that is going to sound best for me. So I have probably over 300 tubes by now, but I am only using maybe 30-40 of them.

 

It is a lot of fun to do tube exploration and tube rolling. When I first tried the 6AV6 I could not stand them because the sound stage was crazy with the back in the front. Luckily I did not throw out the tubes. Then we were informed that box top was the secret, and I discovered the fabulous sound of one half of a 12AT7.

 

After all is said and done,to me, the final reward is listening.....

post #3223 of 10509
Quote:
Originally Posted by kvtaco17 View Post
 

Also had another tube die today... 

So for those of us who are unwashed in the horrifying death of a tube.

 

What happens? Hum, Silence, Flames or does it Grenade and send shards of glass flying everywhere? (I'll have to pick up a helmet and visor for the cat). ;)

On a serious note, it probably would be wise to snap the power off right away and take the headphones out of the jack.

:beerchug: 

post #3224 of 10509
Quote:
Originally Posted by Audiofanboy View Post
 

Depending on the tube type, EI could have used Philips machinery (ECC88 for instance), Telefunken machinery (ECC83 for example) ...

 

Or like here:

 

 

Telefunken-style internals in Philips-style bottle.

post #3225 of 10509

kvtaco 17,

 

Your mortality rate is too high! I had very few tubes die on me, and it was then mainly to trauma. One of my expensive Dutch $85/pair Amperex 5654 tubes fell off a speaker from fright and broke when I cranked up the bass full tilt on a drum recording. (Just kidding, paid $2 but saw them advertised for that price). A 5654 RCA tube lost the vacuum and turned all white inside, maybe from old age - no trauma. A couple of tubes broke during shipping.

 

Another three tubes that became silent were revived by scraping the pins gently with my trusty pocket knife. Did you try this?

 

Curious to know what happened that the tubes stopped functioning?

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