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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 413

post #6181 of 10575
Quote:
Originally Posted by TrollDragon View Post


I would hazard a guess those were made for the General Transformer Corp.'s PeeWee 25W transmitter from the 30's

For $22 a piece i think it's not bad i've seen some 6AS7 go for $$$ so far this is the cheapest.

post #6182 of 10575

Except the 3pcs. of  RCA 6AS7G  for $26 + the killer shipping that Mikelap won from the auction.

post #6183 of 10575

Hi philiptw,

 

IMHO I suggest that you skip the Electro Harmonix 6H30P-i tubes and instead buy a pair of inexpensive Sylvania (or RCA) 6SN7 octal tubes. ( You don't have to go for expensive ones, any Sylvania tube will do). Then you need the proper adapters, and everything is plug and play - no external power supplies needed.

 

These octals will sound better as power tubes than the EH and even the expensive "super" tubes 6H30-DR. If you look through this blog you will find all the information you need - good luck!

post #6184 of 10575
Quote:
Originally Posted by gibosi View Post
 

 

My amp is a hybrid, so I have no experience with power tubes. However, buried in the last 400 pages are a number of discussions. I suggest you click on the "Search This Thread" at the top (or bottom) of this page and search for "6H30P". Good luck.

 

Done that already before i posted.

 

Not a lot of useful things pitching up tho..

 

EDIT: bit the bullet and went for the 6H30Pi-EH in the end..


Edited by philiptw - 5/21/14 at 9:34am
post #6185 of 10575
I tried a pair of 6GU7's as power tubes last night, they didn't sound as good as the 6H30-Pi's, bass fell of dramatically.
post #6186 of 10575
Quote:
Originally Posted by i luvmusic 2 View Post
 
Quote:
Originally Posted by TrollDragon View Post


I would hazard a guess those were made for the General Transformer Corp.'s PeeWee 25W transmitter from the 30's

For $22 a piece i think it's not bad i've seen some 6AS7 go for $$$ so far this is the cheapest.

https://www.vacuumtubes.net/RES%20Audio%20pages/5998.html what do you think of these?

post #6187 of 10575
Quote:
Originally Posted by i luvmusic 2 View Post
 

Hi guys anyone of you familiar with these brand of 6AS7 made by GTC on the base it mark GTC 6AS7G Made in USA.Thanks!

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 90

 

CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 90

 

Hi ilm 2.

 

WAS going to say :Sure looks like the RCA black- plates to me...the dead giveaway for the Russians are the 2 bottom getters shaped like 'flying saucers', and the deep band of silvering, also on the bottom...

 

But then I noticed mine have 2 partial (what look like...) 'blinkers' beneath the plates, just as above them...more research needed lol!...


Edited by hypnos1 - 5/21/14 at 8:27am
post #6188 of 10575

Hi guys.

 

Had a question/pointer from Chris J, when I popped over to the MKIV SE appreciation thread, re the case temperature with the 6AS7Gs in full flight.

 

Well, out came the probe again and (thankfully) things didn't seem too bad - to me, anyway...anyone differ?..viz : 36C after 1 hour, and 39C after 4.5 hrs. And let's face it, that gorgeous glow doesn't come for free, lol!!

 

And with even more hours on the unit, still no nasty surprises..."long may she prosper!".

post #6189 of 10575

Hi,

 

Since I have a self imposed rule of not paying more than $8/tube perhaps I have a different way of shopping Ebay. The other day a pair of RCA(GE?) 6AS7 tubes went for less than $3 incl shipping (I missed the end of the auction), and I bought my one RCA 6AS7 tube for less than $3 incl shipping not long ago.

 

http://www.ebay.com/itm/MATCHED-PAIR-OF-GE-6AS7G-BLACK-PLATE-TUBES-TEST-88-89-AND-90-90-GUARANTEED-/181412339179?pt=Vintage_Electronics_R2&hash=item2a3d049deb

 

Here I will share some points how to find the bargains. The first ingredient is patience. Keep on looking. Try to buy from somebody who is selling off his grandfather's radio repair shop stock rather than somebody who is making a living selling on Ebay.

 

To find out if it is possible to get a real bargain, type in what you are looking for. Bring up the screen; then scroll down on the left and look for a checkbox that says "sold items."

 

Click on it. You may also want to check another box on the left that says "worldwide" to get the global perspective. After doing this you can see what people actually paid. Don't kick yourself if you see that Tung Sol black glass tube that sold two months ago for $5 that the pros are asking $149 for.

 

Now you have established a frame of reference. It could be that what you are looking simply isn't available as a bargain. Either take the plunge, or consult rule#1 - patience. Try again later. Maybe you'll pick up a pair of Lorenz (Siemens) C3g tubes for $10 on German Ebay if you can persuade the seller to ship outside Germany. Clicking Worldwide will not bring up all the sellers; only those that ship internationally. Go to Google and type in Ebay UK or Ebay Germany etc to get access to local sellers.

 

http://www.ebay.de/itm/2x-C3g-Lorenz-Matched-Pair-/360869114154?pt=DE_TV_Video_Audio_Elektronenr%C3%B6hren_Valves&hash=item540579b12a

 

Which brings us to fundamental rule#2: Communication.

 

Email the seller and ask, using Ebay messages. If you see a guy selling a bunch of stuff, maybe he has what you want but it isn't listed. Based on experience I would only do business through Ebay and not outside Ebay because of the buyer protection. Ask the guy to put up your tube for the agreed buy it now price and zap it right away.

 

It may be helpful to use Google translate to communicate with a seller who has trouble understanding English.

 

OK, now you know what is possible with a little luck. How do you sort through several hundred listings for the item you want?

Again, type in what you want: Super Unobtanium 6SN7GTQ. Normally, Best Match comes up first. Go to the drop down menu on the top right and click. Select lowest price+shipping. Click on it.

 

Now you can savor the 99c stores if you are lucky. Just watch out for shipping charges. Scroll down. Your best bargains may not be lowest priced+shipping, but after scrolling down a little further you may find somebody who is selling seven tubes for $9.99 with $4 shipping. What would you rather have? One tube for $6 including shipping, or seven for $14 including shipping?

 

If somebody has a "Submit best offer" don't be afraid to use it by submitting a real low down offer. Your research will tell you what is reasonable. A good seller may make a reasonable counter offer instead of ignoring you. Or the seller may surprise you with accepting your low ball offer...

 

Probably you all know this stuff already, but maybe the above could help somebody to get better buys.

 

Happy tube rolling!


Edited by mordy - 5/21/14 at 10:11am
post #6190 of 10575

For the GTCs, Chathams.

post #6191 of 10575

Too bad they are sold i waited too long.:(

post #6192 of 10575
Quote:
Originally Posted by bbmiller View Post
 

https://www.vacuumtubes.net/RES%20Audio%20pages/5998.html what do you think of these?

i bought a pair of Chathams from this seller.they work fine .

post #6193 of 10575

A local vendor have a RCA 6SN7 GTB for $7 but according to him it was tested 59%.So 59% is a life span of the tube?Sorry clearly i don't know anything about Tubes and electronics.

post #6194 of 10575
Quote:
Originally Posted by mordy View Post
 

Hi,

 

Since I have a self imposed rule of not paying more than $8/tube perhaps I have a different way of shopping Ebay. The other day a pair of RCA(GE?) 6AS7 tubes went for less than $3 incl shipping (I missed the end of the auction), and I bought my one RCA 6AS7 tube for less than $3 incl shipping not long ago.

 

http://www.ebay.com/itm/MATCHED-PAIR-OF-GE-6AS7G-BLACK-PLATE-TUBES-TEST-88-89-AND-90-90-GUARANTEED-/181412339179?pt=Vintage_Electronics_R2&hash=item2a3d049deb

 

Here I will share some points how to find the bargains. The first ingredient is patience. Keep on looking. Try to buy from somebody who is selling off his grandfather's radio repair shop stock rather than somebody who is making a living selling on Ebay.

 

To find out if it is possible to get a real bargain, type in what you are looking for. Bring up the screen; then scroll down on the left and look for a checkbox that says "sold items."

 

Click on it. You may also want to check another box on the left that says "worldwide" to get the global perspective. After doing this you can see what people actually paid. Don't kick yourself if you see that Tung Sol black glass tube that sold two months ago for $5 that the pros are asking $149 for.

 

Now you have established a frame of reference. It could be that what you are looking simply isn't available as a bargain. Either take the plunge, or consult rule#1 - patience. Try again later. Maybe you'll pick up a pair of Lorenz (Siemens) C3g tubes for $10 on German Ebay if you can persuade the seller to ship outside Germany. Clicking Worldwide will not bring up all the sellers; only those that ship internationally. Go to Google and type in Ebay UK or Ebay Germany etc to get access to local sellers.

 

http://www.ebay.de/itm/2x-C3g-Lorenz-Matched-Pair-/360869114154?pt=DE_TV_Video_Audio_Elektronenr%C3%B6hren_Valves&hash=item540579b12a

 

Which brings us to fundamental rule#2: Communication.

 

Email the seller and ask, using Ebay messages. If you see a guy selling a bunch of stuff, maybe he has what you want but it isn't listed. Based on experience I would only do business through Ebay and not outside Ebay because of the buyer protection. Ask the guy to put up your tube for the agreed buy it now price and zap it right away.

 

It may be helpful to use Google translate to communicate with a seller who has trouble understanding English.

 

OK, now you know what is possible with a little luck. How do you sort through several hundred listings for the item you want?

Again, type in what you want: Super Unobtanium 6SN7GTQ. Normally, Best Match comes up first. Go to the drop down menu on the top right and click. Select lowest price+shipping. Click on it.

 

Now you can savor the 99c stores if you are lucky. Just watch out for shipping charges. Scroll down. Your best bargains may not be lowest priced+shipping, but after scrolling down a little further you may find somebody who is selling seven tubes for $9.99 with $4 shipping. What would you rather have? One tube for $6 including shipping, or seven for $14 including shipping?

 

If somebody has a "Submit best offer" don't be afraid to use it by submitting a real low down offer. Your research will tell you what is reasonable. A good seller may make a reasonable counter offer instead of ignoring you. Or the seller may surprise you with accepting your low ball offer...

 

Probably you all know this stuff already, but maybe the above could help somebody to get better buys.

 

Happy tube rolling!

Thank you for the TIPS!

I saw a NOS one piece RCA 6080 for $6.99 + shipping $34.99 + Import charged $7.99 then you convert that to CAD $ WOW.:eek:

post #6195 of 10575
Quote:
Originally Posted by MIKELAP View Post
 

i bought a pair of Chathams from this seller.they work fine .

Hi Mikelap,

    How much was the shipping and other charges?Thank!

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