Hi Thomas is this A-305 a new product? I have never heard of it before. I only know the A-105. Do you have some specs?
Has it got a layout for SE-to-SE only or is it suitable for PP-to-PP as well?
Hylle
I have bought from this place..the last 4P1L i get , is from 1965..give me a more warm sound than the other tubes i have
And there are no tax....
Matched Pair 4P1L Directly Heated Output Pentode F Tube Amplifier Same Year | eBay
I have bought from this place..the last 4P1L i get , is from 1965..give me a more warm sound than the other tubes i have
And there are no tax....
Matched Pair 4P1L Directly Heated Output Pentode F Tube Amplifier Same Year | eBay
Member
Joined 2006
Thanks for sharing this. I also bought a few pairs from this nice gentleman.
Besides warmer sound, anything else you noticed on those of more vintage version? Thanks!
Hi Hylle..
Beardman and I have had quite a conversation, due to the fact that we both
are living in Denmark, more exactly Jylland.
Where are you located in Denmark ??
If your will do the ver 3 of Ales schematic, Beardman is the guy for that, he had tried
virtual any thing worth writing off.
I'm on the ver 1, just to have some DC protection, due to my Cap free DAC and Cap free power amp 2a3DC loftin white.
I have started a thread about 4P1L on hifi4all.dk, but mostly it's beardman and I talking.
/Michael
Beardman and I have had quite a conversation, due to the fact that we both
are living in Denmark, more exactly Jylland.
Where are you located in Denmark ??
If your will do the ver 3 of Ales schematic, Beardman is the guy for that, he had tried
virtual any thing worth writing off.
I'm on the ver 1, just to have some DC protection, due to my Cap free DAC and Cap free power amp 2a3DC loftin white.
I have started a thread about 4P1L on hifi4all.dk, but mostly it's beardman and I talking.
/Michael
Thanks for sharing this. I also bought a few pairs from this nice gentleman.
Besides warmer sound, anything else you noticed on those of more vintage version? Thanks!
I have tried a pair Svetlana 1963 (more microphonic , very warm) , Svetlana 1965 (great tube as beardman mention) , but now just playing on the standard 1986 4P1L.
The last one has the lowest microphonic level of them all (4 different set tested).
It's absolutely not night and day, on ver 1 "little siberian" I can easily adjust
how much warm I prefer, by adjusting the grid leak resistor (47K to 100K).
Again can't tell what the difference is on ver 3 with transformer coupling.
/Michael
Member
Joined 2006
Hello
CFT...
Michael have right about the microphonic in the older tube
and the sound is warmer a little more full bodied in the lower middle-tone..gives me a bit more wide sound
I will let the 1965 tube play some more hours .and see what it gives when it is burned in
those older and newer tubes is only a matter of taste,,just now the older tube fits better to my hifi- (and wife)
Best Bjarne
CFT...
Michael have right about the microphonic in the older tube
and the sound is warmer a little more full bodied in the lower middle-tone..gives me a bit more wide sound
I will let the 1965 tube play some more hours .and see what it gives when it is burned in
those older and newer tubes is only a matter of taste,,just now the older tube fits better to my hifi- (and wife)
Best Bjarne
Member
Joined 2006
Thanks Bjarne. I ordered two pairs vintage and two pairs standard. Had no idea how they differ as the preamp is not built yet. Yes, look forward to hearing more of your impression on the older tubes.
Cheung