An excellent linear regulated power supply is here:
https://www.jameco.com/z/DFU240050D...gle-Output-24-Volt-500-mA-12-Watt_174861.html
https://www.jameco.com/z/DFU240050D...gle-Output-24-Volt-500-mA-12-Watt_174861.html
I was just looking at that Jameco.
Parts ordered via Mouser.
So I will remove stuff clean up the board and wait for the parts!
Anxious to see how this will work out vs my other stuff.
The amp here had a lot of noise from about 1/2 way up on vol pot.
But things were so loud it was like a dont care.
Alex
Parts ordered via Mouser.
So I will remove stuff clean up the board and wait for the parts!
Anxious to see how this will work out vs my other stuff.
The amp here had a lot of noise from about 1/2 way up on vol pot.
But things were so loud it was like a dont care.
Alex
Ok all parts desoldered and removed!
Parts hope to get them by the end of the week.
The op amp maybe early the following week.
Should only take a few hours at best to reinstall and solder.
24vdv Jameco ordered.
Stay tuned.
Alex
thanks to all for the help especially BigSky!!
:>)
Parts hope to get them by the end of the week.
The op amp maybe early the following week.
Should only take a few hours at best to reinstall and solder.
24vdv Jameco ordered.
Stay tuned.
Alex
thanks to all for the help especially BigSky!!
:>)
So far:
Waiting on the PRP's the 4 30 ohm ones.
Holcos are in and the 2604 is in.
Prior to changing all the caps it was very noisey with the vol pot 1/2 way.
Now its dead silent all the way up!
Listening now with X+ZMF VC's high impedance cans and it "Superlative!"..
Such a wonderful amp from 2008!
Amazing beast!
Alex
Waiting on the PRP's the 4 30 ohm ones.
Holcos are in and the 2604 is in.
Prior to changing all the caps it was very noisey with the vol pot 1/2 way.
Now its dead silent all the way up!
Listening now with X+ZMF VC's high impedance cans and it "Superlative!"..
Such a wonderful amp from 2008!
Amazing beast!
Alex
MIchael sent me both Halcos and PRPs for the 22.1K's to try.
I installed the Halcos..
The other 1K and 30ohm PRPs i got from Parts Connexion in Canada be here tomorow.
Dont know if they will make this any better than it is.
Using the Jameco 24 vdc linear as well...
Stands up to most otnher amps I have seriously for this price and age...its amazing.
Thanks much for you help!
Alex
I installed the Halcos..
The other 1K and 30ohm PRPs i got from Parts Connexion in Canada be here tomorow.
Dont know if they will make this any better than it is.
Using the Jameco 24 vdc linear as well...
Stands up to most otnher amps I have seriously for this price and age...its amazing.
Thanks much for you help!
Alex
I only did the R1 (R101) 1k PRP and R11 (R111) 220Ω PRP along with R6 (R106) 22.1k Holco H4.
You can probably leave C6, C106 = 22pF (47pF in early units) polystyrene or mica out of the circuit with the OPA2604 but they are absolutely necessary if you ever want to reinstall the NE5532. I left them in on my amp.
You can probably leave C6, C106 = 22pF (47pF in early units) polystyrene or mica out of the circuit with the OPA2604 but they are absolutely necessary if you ever want to reinstall the NE5532. I left them in on my amp.
I see few versions of this amp:
Music Hall HA11.1 - Available new and guessing rebranded version of OBH-11? Do the upgrades mentioned here will apply to this?
Creek Audio OBH-21SE: @x-pro has shared the schematics.
Creek Audio OBH-21 MK2: @x-pro - I am guessing this is later version of OBH-21 but not sure how it compares to 21SE etc.?
Music Hall HA11.1 - Available new and guessing rebranded version of OBH-11? Do the upgrades mentioned here will apply to this?
Creek Audio OBH-21SE: @x-pro has shared the schematics.
Creek Audio OBH-21 MK2: @x-pro - I am guessing this is later version of OBH-21 but not sure how it compares to 21SE etc.?
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