Hi SaiteiMan,
VTL pushes the voltage ratings, so no junk. Give the Electroharmonix brand a try from New Sensor. I have had good luck with them so far. You can order matched pairs and quads.
Those tubes are made in Russia. At least we know where they come from.
-Chris
VTL pushes the voltage ratings, so no junk. Give the Electroharmonix brand a try from New Sensor. I have had good luck with them so far. You can order matched pairs and quads.
Those tubes are made in Russia. At least we know where they come from.
-Chris
Hi Chris,
thanks for your recommendation.
How about substituting with different types of tube, i.e. ECC801/S, 6201, or 7728 for 12AT7WA. And EL37, KT66, and etc. for 5881/6L6WGC by Soltek.
thanks for your recommendation.
How about substituting with different types of tube, i.e. ECC801/S, 6201, or 7728 for 12AT7WA. And EL37, KT66, and etc. for 5881/6L6WGC by Soltek.
Hi SaiteiMan,
Strangely, the Sovteks do not stand up to high voltages. Stick with Electroharmonix 6L6GC. You can use 7581A's there, but the price difference is gross. I have used both. (7581A is double branded KT-66 sometimes).
For the signal tubes, I used to have to go 6201 to get non-microphonic from National, EH is quieter. Just buy those. I've used almost everything. Lately, (last ten years) I hate National stuff to pieces.
Keep life simple if you can. Don't buy junk.
-Chris
Strangely, the Sovteks do not stand up to high voltages. Stick with Electroharmonix 6L6GC. You can use 7581A's there, but the price difference is gross. I have used both. (7581A is double branded KT-66 sometimes).
For the signal tubes, I used to have to go 6201 to get non-microphonic from National, EH is quieter. Just buy those. I've used almost everything. Lately, (last ten years) I hate National stuff to pieces.
Keep life simple if you can. Don't buy junk.
-Chris
Try 12AZ7 for 12AT7, higher filament current, higher maximum (200V) cathode to filament voltage. Plus they are cheaper and better for cathode followers and I like them better than an 'AT7. I have 5 of them and they are dead quiet. Branded 'National', go figure...
6679, higher max plate voltage, built a little more rugged i.e. made for mobile radio use. May be some-what hard to find a quiet one.
EI makes a good 12AT7 and 12AX7 (long silver plate), but about half of them (12AX7's) are/where microphonic. At least that was the case for me a year ago. But they sound darn good in Hi-Fi applications! A Telefunken "remake" IIRC.
Sorry I'm not much help on the 6L6 types. I'd say Svetlana Winged "C" or EH would be your best bet. AES has them on sale this month:
www.tubesandmore.com
Wayne 😉
Edit: repeated repeated wording.
Not the first time I've said this, but the JJ 12AT7 measure out at half the distortion of any other 12AT7 I have in house. Cheap, too.
For the 5881/6L6WC, you can try a 807, but you have to change the socket. It is much higher as a 6L6 too, and you must rewire the anode to the top of the tube. It can be dangerous, you have been warned, but the 807 is an excellent tube.
I am not sure with the EL37 at you will get the same output without changing the polarisation of the G2. Otherwise, a good KT66 will do the job just fine.
I am not sure with the EL37 at you will get the same output without changing the polarisation of the G2. Otherwise, a good KT66 will do the job just fine.
Here too Sy, The JJ's are on my Christmas "wish list".
Thanks for the info Sy! 😎
Cheers
Wayne
Edit: As for the 807's, they're da**ed good tubes! ;D
Thanks for the info Sy! 😎
Cheers
Wayne
Edit: As for the 807's, they're da**ed good tubes! ;D
I've spoken with Dennis from Chimera Lab. He recommends GS-5965 Sylvania 1960s NOS. Has anyone tried this before?
5965 computer tube 5*
I have 34 of them but about 33% of different manufactuer but none of the flavor you mention. The rest are GE, branded International ServiceMaster. I've found them to be on the bright side and "punchy". I like them and would like to use them somewhere. However they are not a direct drop in replacement for a 12AT7 in most cases. Depending on where they are used, you may have to make some resistor/bias adjustments.
12AV7 is it's reverse mirror twin (Rp-Gm). Other similar tubes include the 6BQ7, 6BK7. Similar in most parameters, sound is totally different. Getting closer to a 12AT7: 12AZ7, 12DT8, 6DT8, 6AQ8/ECC85 and I'm sure there is one or two I've missed.
Has anyone here tried/used a 12FV7 in anything?
µ= 21.5
Rp= 2250
Gm= 9600
Base= 9A
Vh= 12.6/6.3
Ih= 0.45/0.9
Eb= 330V
Ik max= ?
Vh-k max= ?
Wayne
I have 34 of them but about 33% of different manufactuer but none of the flavor you mention. The rest are GE, branded International ServiceMaster. I've found them to be on the bright side and "punchy". I like them and would like to use them somewhere. However they are not a direct drop in replacement for a 12AT7 in most cases. Depending on where they are used, you may have to make some resistor/bias adjustments.
12AV7 is it's reverse mirror twin (Rp-Gm). Other similar tubes include the 6BQ7, 6BK7. Similar in most parameters, sound is totally different. Getting closer to a 12AT7: 12AZ7, 12DT8, 6DT8, 6AQ8/ECC85 and I'm sure there is one or two I've missed.
Has anyone here tried/used a 12FV7 in anything?
µ= 21.5
Rp= 2250
Gm= 9600
Base= 9A
Vh= 12.6/6.3
Ih= 0.45/0.9
Eb= 330V
Ik max= ?
Vh-k max= ?
Wayne
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