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2359glenn | studio
Dec 17, 2017 at 5:05 AM Post #17,281 of 39,986
Listening to Sam Cooke now. Bringing it home to me. Beautiful simply beautiful. It can't get better than this. The 6sn7s deserves another photo.

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Dec 17, 2017 at 5:31 AM Post #17,283 of 39,986
jekjek said:
UT, how about 6 foton 6SN7?
A cheap alternative to 6bx7
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That will work for sure but I have only 2 Fotons. :smile_phones:

You could use 7 ordinary 6sn7gtb and it should still sound good. I'll take out the prima donnas in a minute and swap in the cheap tubes just to prove. :smile_phones:
 
Dec 17, 2017 at 6:05 AM Post #17,284 of 39,986
Cheap tubes are in and sounding good. If you know the characteristics of each 6sn7s, you can combine for a pleasing effect or create the tone that you desire. After a while, you will know that each 6sn7 type and brand have their own unique tone. Some are brighter. Others are warmer, lusher and more solid in bass.

Driver - Psvane 6SN7 uk edition - good bloom and bass
1st pair - Sylvania 6sn7gtb chrome top - light tone
2nd pair - Fotons - mid heavy tone
3rd pair - RCA 6sn7gtb - middle of the road

The amp has been outstanding with all the tubes I've rolled thus far. Not a single one hum or has any noise but then I keep only the good tubes and I usually buy new NOS tubes. All these tubes used here I'd consider cheap but still good.

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Dec 17, 2017 at 6:12 AM Post #17,285 of 39,986
I'm using HD800 with all these listening test and bass is ample and has a good kick. Bare in mind though that if you like deep hard impact, you would have to go to the 6BX7. Bass there is in another league. Apart from that Seven 6sn7s sounds great.
 
Dec 17, 2017 at 6:37 AM Post #17,287 of 39,986
This amp will sound good with cheap tubes but give it some love if you can. Performance grows with better tubes used and this amp deserves it. This weekend has been a special one for me. I have the luxury of listening to music uninterrupted apart from a dinner outing with my family yesterday. I'm in awe with what I'm hearing from this amp. I realise I have not power on my lounge stereo system for 5 days now.
 
Dec 17, 2017 at 7:56 AM Post #17,288 of 39,986
Time to finish off for the night but not before my last thoughts for the weekend.. After some time with various combinations, I returned to C3G and 6BX7 and realised how special this combination is. Whilst all the other combinations are good, the C3G and 6BX7 just stood out for me. Now over to others to share their impressions.
 
Dec 17, 2017 at 9:25 AM Post #17,289 of 39,986
UntilThen said:
This amp will sound good with cheap tubes but give it some love if you can. Performance grows with better tubes used and this amp deserves it. This weekend has been a special one for me. I have the luxury of listening to music uninterrupted apart from a dinner outing with my family yesterday. I'm in awe with what I'm hearing from this amp. I realise I have not power on my lounge stereo system for 5 days now.
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When I built the first OTL I used the cheapest tubes Russian 6H13 and 1633 $4 and this sounded great.
I really never upgraded tubes eventually I tried the 13D1 but never changed the output tubes. Sounded great
with these low cost 6H13s.
It could only use the 25 volt SN7s 1633 & 13D1 but the 1940s 1633 sounded up there with the best SN7s for $4
 
Dec 17, 2017 at 9:37 AM Post #17,290 of 39,986
2359glenn said:
When I built the first OTL I used the cheapest tubes Russian 6H13 and 1633 $4 and this sounded great.
I really never upgraded tubes eventually I tried the 13D1 but never changed the output tubes. Sounded great
with these low cost 6H13s.
It could only use the 25 volt SN7s 1633 & 13D1 but the 1940s 1633 sounded up there with the best SN7s for $4
Click to expand...

Any difference between 6H13s and 6N5S Glenn?
 
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