to push the phono to limit I try some basic suggestion ,corrections and help are welcome !
fist use a Sals shunt! a must
- all dual mono ,psu-shunt- phono
-cooking parts , only trying you will knows
use separate box for trafo and psu , the shunt in phono box and better put the heatsink out .
now we need a connection beetwen ,here the
RFI ,better use not so long screeened and tinned cable ,connector neutik,at last there is a model anti rfi , yes tinned becouse don't carry so much the RFI and protect the copper ,a good paper ,supra cable can be found on ebay.... here andhere
supra cable can be found on ebay.... decent
the box for decent protect you need 10mm of alu ,put only small hole to avoid rfi , any suggestion ??
fist use a Sals shunt! a must
- all dual mono ,psu-shunt- phono
-cooking parts , only trying you will knows
use separate box for trafo and psu , the shunt in phono box and better put the heatsink out .
now we need a connection beetwen ,here the
RFI ,better use not so long screeened and tinned cable ,connector neutik,at last there is a model anti rfi , yes tinned becouse don't carry so much the RFI and protect the copper ,a good paper ,supra cable can be found on ebay.... here andheresupra cable can be found on ebay.... decent
the box for decent protect you need 10mm of alu ,put only small hole to avoid rfi , any suggestion ??
hi george,
xover freqencies are approx. 450 and 3000 hz. Its difficult to determine the bassrolloff for me its more than enough. I can not measure it appropiatly.
for the highfreqhorn I use a BMS 4538 for the midhorn I use an eton 4-200/A8/25 HEX.
and for lowfreqhorn a focal 10 V 6412. I like the sound of these units in this way a lot. At the time when I build it I had no money to try a 2 inch compdriver.
But when I had to build it again I would try an bms coaxialdriver in the midhorn and skip the highfreqhorn.
I would use an other lowfreqdriver too but I had the focal laying around tried it and was not dissappointed.
As for the plans I really have to dig in my archive but if you are serious about it I can dig it up. But I warn you it is a lot of work, alot of rounded corners and to makes these really nice you'll need lots of epoxy, thin layers of wood etc.
I made the mid end highfreq horns myself too. First made a mould off mdf on a lathe and then epoxyresin + glassfiber. The midhorn is about 43 cm in diameter.
I designed all horncontours and enclosures with ajhorn. very good software.
When you want to build them for yourself no problem but for commercial purposes contact me first
greetings roy
xover freqencies are approx. 450 and 3000 hz. Its difficult to determine the bassrolloff for me its more than enough. I can not measure it appropiatly.
for the highfreqhorn I use a BMS 4538 for the midhorn I use an eton 4-200/A8/25 HEX.
and for lowfreqhorn a focal 10 V 6412. I like the sound of these units in this way a lot. At the time when I build it I had no money to try a 2 inch compdriver.
But when I had to build it again I would try an bms coaxialdriver in the midhorn and skip the highfreqhorn.
I would use an other lowfreqdriver too but I had the focal laying around tried it and was not dissappointed.
As for the plans I really have to dig in my archive but if you are serious about it I can dig it up. But I warn you it is a lot of work, alot of rounded corners and to makes these really nice you'll need lots of epoxy, thin layers of wood etc.
I made the mid end highfreq horns myself too. First made a mould off mdf on a lathe and then epoxyresin + glassfiber. The midhorn is about 43 cm in diameter.
I designed all horncontours and enclosures with ajhorn. very good software.
When you want to build them for yourself no problem but for commercial purposes contact me first
greetings roy
Thank you very much for the info roy!
Well, a bass horn is not on my soon to do plans, but I am sure I will built one some day. I will let you know then.
For the time being, I plan to use some horns from about 800hz up with Altec 288 drivers, to replace the top of my OB basszilla type speaker when winter comes.
Well, a bass horn is not on my soon to do plans, but I am sure I will built one some day. I will let you know then.
For the time being, I plan to use some horns from about 800hz up with Altec 288 drivers, to replace the top of my OB basszilla type speaker when winter comes.
roy algra said:
Thanks Roy. Good workmanship on the horns. I see why you take extra care to prevent possible noise. High sensitivity speakers...
I have 95dB sens 3 way tower, self designed DIY with direct radiators. I use a 2mV High MC Denon and 43dB gain. My preamp is a 6V6 trioded buffer and my KT-88 trioded amp has 31dB gain. Zero audible hiss or hum with TT. The issues to be solved if they ever come up, are in power regulation and grounding. Don't worry about intrinsic noise in the phono. Its adequately low. If you look back in the thread, Ricardo (RCruz) has shown his precautions and grounding schemes that step by step led him to tuned tone, low noise floor and buzz free life. You must make it first, and from there we start tweaking for sound or other issues. Guys here have a lot to suggest.
I used the 3s just because that was available at 0.1uF FT on Ebay at the time. I also wanted a batch that could double its role in my valve projects too. There is good to stash on high enough Voltage. I would assume that 2s must be 99% the same stuff in the phono application, and they are smaller as a bonus. That is good for a shorter layout.
Hi salas,
Nice setup Ive seen the pictures on your earlier posts. Have you ever heard an akido preamp? I really like it a lot. I would like to have a liitle gipsen statue of john broskie like the ones you have of mozart and other composers where you see the head and the part of the upper body, you know what I mean. and place it near the akido.
I ve made a layout for your design. and Iam gonna etch it soon.
I made it possible to put 3 sk170bl in the first stage, but the componentvalues are for 2 devices. If someone is interrested I can always make a version with just one device.
and if someone wants a highresfile just email. or is there another way to attach somewhat larger files to a reply?
greetings roy
Nice setup Ive seen the pictures on your earlier posts. Have you ever heard an akido preamp? I really like it a lot. I would like to have a liitle gipsen statue of john broskie like the ones you have of mozart and other composers where you see the head and the part of the upper body, you know what I mean. and place it near the akido.
I ve made a layout for your design. and Iam gonna etch it soon.
I made it possible to put 3 sk170bl in the first stage, but the componentvalues are for 2 devices. If someone is interrested I can always make a version with just one device.
and if someone wants a highresfile just email. or is there another way to attach somewhat larger files to a reply?
greetings roy
