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6SN7 Tube Addicts
Apr 23, 2015 at 2:09 AM Post #4,816 of 7,413
khragon said:
  Anyone have recommendation on a modern day still in production 6SN7?
 
I'm looking at the following:
Shuguang Treasure CV181
Psvane CV181-TII
Sophia 6SN7
 
Any of them approaching the TS BGRP performance? 
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No experience with Psvane & Shuguang, had the Sophia's . They have good bass & are warm sounding,  treble resolution is average. They are not bad but not worth  their retail price. IMO If you can get a pair for around $ 50 try them if you like warm, bassy sound.
 
Apr 23, 2015 at 3:46 PM Post #4,817 of 7,413
skylab said:
I never tried the Psvane, but I tried the Shuggie CV181 and the Sophia, and IMHO, even a "lowly" Sylvania 6SN7GTB sounded better than either one.
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+1 on the Sophia. I got it free with a tungsol new issue as well with my amp and yeah my $35 chrome dome 6sn7gtb from brent jesse is more preferable than either. Khragon I hate to say it but 6sn7w, b65, 5692 red base if you want something close to the same level. 
 
Apr 24, 2015 at 1:13 AM Post #4,818 of 7,413
jibzilla said:
 
+1 on the Sophia. I got it free with a tungsol new issue as well with my amp and yeah my $35 chrome dome 6sn7gtb from brent jesse is more preferable than either. Khragon I hate to say it but 6sn7w, b65, 5692 red base if you want something close to the same level. 
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Can you provide me some link to these tubes? any particular one stand out between the 3? 6sn7w, b65 and 5692.
 
Apr 24, 2015 at 1:23 AM Post #4,819 of 7,413
punit said:
  had the Sophia's . They have good bass & are warm sounding,  treble resolution is average. They are not bad but not worth  their retail price.
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Too bad that it does'nt make beautiful music as it's beautiful.

 
Apr 24, 2015 at 1:56 AM Post #4,820 of 7,413
khragon said:
 
Can you provide me some link to these tubes? any particular one stand out between the 3? 6sn7w, b65 and 5692.
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www.hifishark.com. Just type in 6sn7w, Marconi b65, and 5692. You want metal and black base 6sn7w's, long or short bottle. I see one guy has a pair of black base short bottle's for $159 on ebay. Not bad imo. There is also an auction for a pair of metal base long bottle, there is no metal base short bottle that I know of. The metal base long bottles are the most sought after.
 
B65's there only seems to be one pair at $1200. You can make an offer of $600 but that's as much as I would pay. There were quite a few a while back, I think some more will pop up.
 
5692's you want red bases. There are quite a few for sale right now. I like the one green girl is selling for $90. I have bought from them and nice tubes imo.
 
Again I have not tried out the TSRP yet but these are my most expensive and fav. 6sn7's.
 
Apr 28, 2015 at 4:00 PM Post #4,822 of 7,413
A few days ago, I pointed out eBay listing # 331535675354 for a pair of Radiotron VT231 JAN-6SN7GT tubes manufactured in Australia. My curiosity got the best of me, I made an offer and ended up getting a pair.
 
Interestingly, in each box, there is a small piece of paper listing the number and dates of all the applicable Australian and New Zealand patents, none later than 1939. Further, there is a note at the bottom: "The sale of this device does not carry a license to use it for any commercial or revenue-earning purposes." So I think it likely that these were manufactured during WWII.
 
I am not as experienced as many in this forum, but for what it is worth, the components and construction of this tube appear to be different than any I have seen. The smooth flat-black thin box-plates and the sheet metal used as heat radiators and bracing under the first spacer are especially interesting.
 
Popped one in the amp and I am pleased to report it lights up and plays. And of course, after only 10 minutes it is too soon to say anything more than it doesn't sound bad. Since I am a bit of tube collector, even if it doesn't knock my socks off, I am still quite pleased to have them. :)
 

 
 

 

 
Apr 28, 2015 at 5:51 PM Post #4,823 of 7,413
 
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gibosi said:
  A few days ago, I pointed out eBay listing # 331535675354 for a pair of Radiotron VT231 JAN-6SN7GT tubes manufactured in Australia. My curiosity got the best of me, I made an offer and ended up getting a pair.
 
Interestingly, in each box, there is a small piece of paper listing the number and dates of all the applicable Australian and New Zealand patents, none later than 1939. Further, there is a note at the bottom: "The sale of this device does not carry a license to use it for any commercial or revenue-earning purposes." So I think it likely that these were manufactured during WWII.
 
I am not as experienced as many in this forum, but for what it is worth, the components and construction of this tube appear to be different that any I have seen. The smooth flat-black thin box-plates and the sheet metal used as heat radiators and bracing under the first spacer are especially interesting.
 
Popped one in the amp and I am pleased to report it lights up and plays. And of course, after only 10 minutes it is too soon to say anything more than it doesn't sound bad. Since I am a bit of tube collector, even if it doesn't know my socks off, I am still quite pleased to have them. :)
 

 
 

 
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Never heard of them, but they do look kinda cool!
 
I will be interested to hear your impressions after more hours of listening.
 
Apr 28, 2015 at 11:11 PM Post #4,825 of 7,413
In the first and third pictures above, on the right, at the same level as the top of the base, you can just see the edge of a capital D getter. However, most of the getter splash is below the level of the top edge of the base.
 
Edit: Here is a better picture. A big rectangular D getter
 

 
Apr 30, 2015 at 10:52 AM Post #4,826 of 7,413
Since these Australian-made AWA (Amalgamated Wireless Australasia Ltd) tubes were sold under the RCA "Radiotron" brand name, it seemed appropriate to try to compare one to a gray-glass RCA of the same vintage. Listening to a few songs through each tube, it is clear that the AWA is not simply an RCA manufactured in Australia. But given the differences in construction, this was not a surprise to me. My initial impression is the AWA tube is a tad bit brighter and airier than the RCA. I may be overreaching, but given that AWA had the rights to all present and future patents of Marconi and Telefunken, as well as RCA, I might say that it is a combination of RCA, Marconi and Telefunken. lol. Anyway, I think it is quite a nice tube.
 
Apr 30, 2015 at 4:44 PM Post #4,827 of 7,413
gibosi...thanks to you....here is my $13 treasure that just arrived today  
biggrin.gif

 

 

 

 
This made me grin from ear to ear.
 
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