If there was ever a phonostage and TT both in desperate need of a good cartridge, you are going to have that combo! 🙂 🙂 🙂
Right now weak link is the Pyle Pro phono stage (ouch). I had not bought a record in 25 years until 2 months ago and then started sliding down this slippery slope....
I would like to do a 1U chassis with B1 and Pearl boards and a 2u chassis with B1 and Pearl 2 PSU, transformers with 6L6 style umbilical. First need to complete the F5
I would like to do a 1U chassis with B1 and Pearl boards and a 2u chassis with B1 and Pearl 2 PSU, transformers with 6L6 style umbilical. First need to complete the F5
I don't think the capacitors on the Pearl will fit a 1U - you might find some short enough... Check before you purchase a chassis.
And you also might want to change the feedback resistors in the F5 to have a bit more gain if you are using a B1... 🙂
R5, R6, R7, R8 are the feedback resistors. Stock they are 100ohm 3W
To decrease the feedback and increase the gain change them to 150ohm 3W or 220ohm 3W.
To decrease the feedback and increase the gain change them to 150ohm 3W or 220ohm 3W.
Looks great!
Are the long terminal strips are you can use the Universal Mounting Spec to it's fullest and swap different amplifier (F5, F4, etc...) boards into the same chassis?
Are the long terminal strips are you can use the Universal Mounting Spec to it's fullest and swap different amplifier (F5, F4, etc...) boards into the same chassis?
Yes. I want to swap boards easily without soldering. Looking forward to more UMS boards in the future. Aleph J?
Chassis work and PSU pretty much done. Ready to heat it up tomorrow. Need to wire up a light bulb first.
Bill,
That looks good so far! (Well, as much as I can see from one photo...)
Only one question, do you have an individual wire for V+, GND, and V- to each amp board? (In your case, terminal strip)?
Disconnect the Diodes from the caps on first power up, to make sure that your polarities are correct and voltages in the ballpark. (they will be high with no load)
Then hook the caps to the bridges and stand back. If they don't blow up (which is good) then measure your voltages at the PSU outputs and see if they too are in the ballpark.
If yes, then unplug it, keep calm and carry on with the amp boards.
That looks good so far! (Well, as much as I can see from one photo...)
Only one question, do you have an individual wire for V+, GND, and V- to each amp board? (In your case, terminal strip)?
Disconnect the Diodes from the caps on first power up, to make sure that your polarities are correct and voltages in the ballpark. (they will be high with no load)
Then hook the caps to the bridges and stand back. If they don't blow up (which is good) then measure your voltages at the PSU outputs and see if they too are in the ballpark.
If yes, then unplug it, keep calm and carry on with the amp boards.
Good eye. Not enough rails from the PSU to the terminal blocks. Need to solder a few more wires to the board. Thanks for info on turning it up. Still need to stuff the amp boards. Wanted to get the power, chassis set first.
I had the polarity on the bridge rectifier reversed on one side. Fixed - but the power led is dead on that side. I am getting about ~25.5 on all rails - looks OK now.
Six F5 together with power supply SMPS
Hi all,
Some more pictures of the front panel of the unit multiple F5 called "Percheron digama buffer."
More pics https://www.facebook.com/augustojose.hoffmann
Hi all,
Some more pictures of the front panel of the unit multiple F5 called "Percheron digama buffer."
More pics https://www.facebook.com/augustojose.hoffmann
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Re: Six F5 together.....
.......you must have one huge, huge, gigantic, very large switching power supply to run six F5's (but I don't think I see it, in your pics.....(!) 😱
As for those heatsinks, a manufacturer in the U.S., check out this thread:
http://www.diyaudio.com/forums/pass-labs/196652-heatsink-candidate-class.html?highlight=heatsink
.......you must have one huge, huge, gigantic, very large switching power supply to run six F5's (but I don't think I see it, in your pics.....(!) 😱
As for those heatsinks, a manufacturer in the U.S., check out this thread:
http://www.diyaudio.com/forums/pass-labs/196652-heatsink-candidate-class.html?highlight=heatsink
Hi CanAm Man,
Heatsinks made in Brazil by "HS Dissipadores". Set of 8 units model 125.137, measuring 125x137 mm and Thermal Resistance: 0.66 °C/W/4"
HS Beneficiamento de Alumínio
The power supply is one SMPS of Connexeletronic (Vasilache) 1KW model A1000SMPS.
F5 Pass: more pics and info:
https://www.facebook.com/media/set/?set=a.259949857464151.61011.100003474163418&type=1
Heatsinks made in Brazil by "HS Dissipadores". Set of 8 units model 125.137, measuring 125x137 mm and Thermal Resistance: 0.66 °C/W/4"
HS Beneficiamento de Alumínio
The power supply is one SMPS of Connexeletronic (Vasilache) 1KW model A1000SMPS.
F5 Pass: more pics and info:
https://www.facebook.com/media/set/?set=a.259949857464151.61011.100003474163418&type=1
Attachments
100% Finished
The front panel arrived yesterday from Front Panel Express. They did an amazing job. My F5 is officaly complete. Listening to Radiohead "King of Limbs" right now and it sounds amazing. I was listening to CSNY "Four-Way Street" and I heard a low buzz and was a bit concerned. It was actually the PA buzz on the recording! I have been listening to this record for my whole life and it was like hearing it for the first time! Listening to Coltrane and Monk "Live at Carnegie Hall" and you can really hear Monk humming along in the background! Through the solder fumes, we often forget this all about listening to music...
Thanks again to 6l6 for an awesome build guide and the offline support. I had my Google Nexus tablet on the workbench reviewing the photos and write-ups of this post the whole time. Need to finish my Pearl 2, start my Mezmerize B1. Great hobby!
The front panel arrived yesterday from Front Panel Express. They did an amazing job. My F5 is officaly complete. Listening to Radiohead "King of Limbs" right now and it sounds amazing. I was listening to CSNY "Four-Way Street" and I heard a low buzz and was a bit concerned. It was actually the PA buzz on the recording! I have been listening to this record for my whole life and it was like hearing it for the first time! Listening to Coltrane and Monk "Live at Carnegie Hall" and you can really hear Monk humming along in the background! Through the solder fumes, we often forget this all about listening to music...
Thanks again to 6l6 for an awesome build guide and the offline support. I had my Google Nexus tablet on the workbench reviewing the photos and write-ups of this post the whole time. Need to finish my Pearl 2, start my Mezmerize B1. Great hobby!
