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Post by Deleted on Aug 13, 2019 15:53:09 GMT
Been watching a couple interview videos of Nelson Pass. Seems like a decent chap.
Always been a little curious of his First Watt amps, like the F6 for example.
Anyone heard First Watt amps? Or even the DIY versions?
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Bigman80
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Post by Bigman80 on Aug 13, 2019 16:00:00 GMT
My only Pass design was the Adcom GFA555.
My mate has had a few of his designs and rates them. He’s never had a First Watt though.
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Post by antonio on Aug 13, 2019 16:42:27 GMT
They get good reports, start saving Shane.  |
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Post by alit on Aug 13, 2019 19:46:18 GMT
Great amps, never heard a poor design from him. Had an F5 in the past, also currently have a diy Aleph 3. Heard a good few diy amps, also used some of the huge Pass monos at a show where I helped Nick out.
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Bigman80
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Post by Bigman80 on Aug 13, 2019 20:01:47 GMT
Great amps, never heard a poor design from him. Had an F5 in the past, also currently have a diy Aleph 3. Heard a good few diy amps, also used some of the huge Pass monos at a show where I helped Nick out. I like the fact he’s given so much to the DIY community. I’d expected to have more of his gear but it never happened. I’m settled now so it likely never will. Hopefully I will get to hear more, courtesy of my mate, who loves his stuff. |
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Post by alit on Aug 13, 2019 20:15:09 GMT
Yeah, really can’t fault it, great bloke and generous with his designs.
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Post by hornucopia on Sept 12, 2020 11:50:01 GMT
Been happy with an F3-which 'suits' my full-range Ocellia Calliope perfectly.
Good with horns too, which don't need many watts, just purity.
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Post by Deleted on Sept 29, 2020 16:11:10 GMT
I have an f5 and a b1 for my amplification.
The f5 booted my last valve amp out a couple of years ago and i havent been tempted back since.
The b1 is more recent,just as good as the f5 so that was bought to go with it
I personally have only heard one better sand amp which was one of nicks p6 amps. I cant afford p6 amps. So im happy.
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Post by jandl100 on Sept 30, 2020 12:12:13 GMT
Pass's amps that I've heard are a bit too relaxed dynamically for me, although the latest .8 series are said to be better.
I've not heard a First Watt, though.
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Post by hifinutt on Oct 6, 2021 21:51:18 GMT
Any one keen to try a sit 3 should have a look at aos classifieds....Very rare amp .would love to try one but f5 are ok at the moment
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Post by hifinutt on Dec 30, 2021 12:13:06 GMT
a few pass XA25 coming up in classifieds these days . good opportunity for someone . one chap says his townshend reference passive does not work well with his xa25 which surprises me
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Bigman80
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Post by Bigman80 on Dec 30, 2021 12:22:11 GMT
a few pass XA25 coming up in classifieds these days . good opportunity for someone . one chap says his townshend reference passive does not work well with his xa25 which surprises me Why?, TVCs are not universally compatible |
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Post by macca on Dec 30, 2021 12:56:42 GMT
X25 input impedance is 47Kohm but Townshend don't specify the output impedance of their pre-amp so it might conceivably be incompatible.
Although that would mean it would be incompatible with a lot of other power amps too, which seems unlikely. 47K is pretty much 'normal'.
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Bigman80
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Post by Bigman80 on Dec 30, 2021 13:57:21 GMT
X25 input impedance is 47Kohm but Townshend don't specify the output impedance of their pre-amp so it might conceivably be incompatible. Although that would mean it would be incompatible with a lot of other power amps too, which seems unlikely. 47K is pretty much 'normal'. Some amps just don't get on with TVCs. I have had that before with the Slagle. Impedance didn't suggest an issue but it just didn't sound right and was subsequently ousted by the preamp section of that Xiang Sheng Valve DAC that took the internet by storm a few years back. |
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Post by macca on Dec 30, 2021 14:32:50 GMT
Yes I've come across that before myself where there's no impedance mis-match but they still don't sound quite right together in practice. I don't understand why that is but must be a reason. Impedance is not the only fruit.
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Bigman80
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Post by Bigman80 on Dec 30, 2021 15:35:37 GMT
Yes I've come across that before myself where there's no impedance mis-match but they still don't sound quite right together in practice. I don't understand why that is but must be a reason. Impedance is not the only fruit. Yep. I couldn't explain it at the time either, so just quietly moved the Slagle on. Started the whole DCB1 journey, but again that one didn't always play nice with everything else. |
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Post by hifinutt on Dec 31, 2021 13:53:32 GMT
a few pass XA25 coming up in classifieds these days . good opportunity for someone . one chap says his townshend reference passive does not work well with his xa25 which surprises me Why?, TVCs are not universally compatible i guess ypu must be right , just had an awful lot of TVC passives with various amps and few issues |
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Post by rich04 on Feb 9, 2022 9:42:21 GMT
I have just brought a used First watt B1 r2 pre amp and have replaced the volume pots for a pair of Tribute AVC Seems to work well.
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Bigman80
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Post by Bigman80 on Feb 9, 2022 10:09:55 GMT
I have just brought a used First watt B1 r2 pre amp and have replaced the volume pots for a pair of Tribute AVC Seems to work well. So you're now buffering your Tributes with the B1. Interesting. |
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Post by rich04 on Feb 9, 2022 10:44:59 GMT
Just something i wanted to try but it does seem to make things sound a bit tighter only patched together at the moment.Did want to try a valve buffer even brought a Aikido valve buffer kit from Glassware but can not get it working.So saw the B1 and giving it a try.Also just found a guy on DIY AUDIO who makes a thing could the Iron pumpkin i might have to look into that as well. Having said that i would be more than happy to live with just the Tributes.
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Bigman80
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Post by Bigman80 on Feb 9, 2022 10:55:17 GMT
Just something i wanted to try but it does seem to make things sound a bit tighter only patched together at the moment.Did want to try a valve buffer even brought a Aikido valve buffer kit from Glassware but can not get it working.So saw the B1 and giving it a try.Also just found a guy on DIY AUDIO who makes a thing could the Iron pumpkin i might have to look into that as well. Having said that i would be more than happy to live with just the Tributes. Yeah, buffers are great. I did have designs on making a valve buffer at one point but totally forgot about it lol. |
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Post by rich04 on Feb 9, 2022 11:05:22 GMT
Well if you ever do it let me know.I wish it was something i could do.
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Bigman80
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Post by Bigman80 on Feb 9, 2022 11:16:20 GMT
Well if you ever do it let me know.I wish it was something i could do. I'll have a chat with the Guru and see what he can come up with. |
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Post by firebottle on Feb 9, 2022 12:01:12 GMT
Just something i wanted to try but it does seem to make things sound a bit tighter only patched together at the moment.Did want to try a valve buffer even brought a Aikido valve buffer kit from Glassware but can not get it working.So saw the B1 and giving it a try.Also just found a guy on DIY AUDIO who makes a thing could the Iron pumpkin i might have to look into that as well. Having said that i would be more than happy to live with just the Tributes. What Aikido kit did you buy? Can I help? |
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Post by rich04 on Feb 9, 2022 12:09:36 GMT
It is the ACF 12VAC I have tried getting in touch with Glassware but they do not reply to e-mails.Not sure what i have done wrong it seems a simple kit.But its not firing up the valves (ecc99)there is power getting to the valve sockets 12 vdc across the heater pins 4-5.??
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Post by firebottle on Feb 9, 2022 14:18:33 GMT
Firstly are you using a 12V AC supply, rather than DC.
You mentioned 12V DC on the heaters.
The unit won't work from a DC supply, it has to be AC.
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Post by rich04 on Feb 9, 2022 15:53:24 GMT
Yes it is a 12v ac supply.I will be honest and admit i used a 12v dc supply to start with.
Thought it was going to be a easy kit for me to put together,i can solder and follow simple instructions.Will maybe try and sell it as non working.
Thanks for your time.
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Bigman80
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Post by Bigman80 on Feb 9, 2022 16:15:48 GMT
Yes it is a 12v ac supply.I will be honest and admit i used a 12v dc supply to start with. Thought it was going to be a easy kit for me to put together,i can solder and follow simple instructions.Will maybe try and sell it as non working. Thanks for your time. Give me a shout ..... I may be interested |
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Post by misterc on Feb 9, 2022 16:51:02 GMT
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Post by rich04 on Feb 12, 2022 8:48:33 GMT
Firstly are you using a 12V AC supply, rather than DC. You mentioned 12V DC on the heaters. The unit won't work from a DC supply, it has to be AC. It lives,needed 18 v ac to get it working not 12v ac.After some advice from someone who has one i connected it up to a variac and slowly took it up to 18v hey presto.Now to try the Tributes with it. |
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