Just in case it really is coming from the line stage. Better secure that fact first. But a Dale was more transparent anyway.
Check for ringing on 10kHz squarewaves if without a stopper. It does work with clean rising edge sans stopper sometimes depending on wiring, pot, etc.
So not especially prone to highlight hiss though sensitive enough. If its the source and the gain surfacing it, and because you had been listening with no line gain before, its not a bad idea to check the system with the bootstrap buffer option too before you settle. Just a rewiring, not major.
It's been too long 🙂
Came back for a taste of your 6V6 pre.
Got one in the oven right now, very basic to begin with.
I noticed the Simplistic HV has a version two, suited for higher voltages.
Must locate the parts to build one. Lots of smoke hanging in the air in that tread
Bas, you built 2 separate power supplies, one for each channel?
Was there any noticable difference than one ps for both channels?
Was there any noticable difference than one ps for both channels?
I never compared. I just used what would fit in the low chassis I had. Since the chokes were 40mA I had to use 2. 😀
fellas,
I need your advice...
I "have lost the ball" concerning the transformer.I find output/amp/driver/preamp/blabla transformers and I have no clue what the differences are...
Can you suggest one to me for the 6v6?
And also an inductor (choke??) cause I haven't found anything yet at 20H@>100ma..
Maybe a link or two?
I need your advice...
I "have lost the ball" concerning the transformer.I find output/amp/driver/preamp/blabla transformers and I have no clue what the differences are...
Can you suggest one to me for the 6v6?
And also an inductor (choke??) cause I haven't found anything yet at 20H@>100ma..
Maybe a link or two?
Mekanixz,
Try building it according to schematic, using CRC prefilter into SSHV2. If you like it, then you can add CLC prefilter later. Get the main amp section up and running cleanly first. I'll help anyway I can and I am sure others will do the same.
Try building it according to schematic, using CRC prefilter into SSHV2. If you like it, then you can add CLC prefilter later. Get the main amp section up and running cleanly first. I'll help anyway I can and I am sure others will do the same.
Concerning where you live:
Toroidal transformers Amplimo or Toroidal Transformers Amplimo - toroidal-transformer.com
Staffan
Toroidal transformers Amplimo or Toroidal Transformers Amplimo - toroidal-transformer.com
Staffan
Here also : Lundahl Transformers, audio transformer and tube amplifier transformer manufacturer
I use their chokes and they have some that are 20H - 200mA. You can even specify them custom values.
For mains transformers, you can always order locally - cheaper also - I use custom ordered ones EI from Giatras. Just be sure to give the correct specs.
I use their chokes and they have some that are 20H - 200mA. You can even specify them custom values.
For mains transformers, you can always order locally - cheaper also - I use custom ordered ones EI from Giatras. Just be sure to give the correct specs.
built one
A very simple box with parts I had at hand. Went overboard on two serial regs (were laying idle) and NOS Fivre tubes. Just one input (ha); I need the preamp's amplification to drive a small poweramp. No hiss or hum (after I connected the heaters to ground). These are old parts and certainly no boutique products so I won't comment on initial reproduction quality. It's alive and it works smoothly, not bad for a days work.
Somehow PSUD simulated out of the ballpark. I use a voltage doubler which was calcutated for 480V but the thing delivers 530V. Of cause this strains the capacitors on the raw voltage so I had to series connect some, this not the way I normally work things out. The PSU has low capacitance and gives almost 2V ripple which is swamped by the regs to less than 1mV (on the Fluke that is).
Promising design Salas, I like it and will like it more once built to higher standards.
A very simple box with parts I had at hand. Went overboard on two serial regs (were laying idle) and NOS Fivre tubes. Just one input (ha); I need the preamp's amplification to drive a small poweramp. No hiss or hum (after I connected the heaters to ground). These are old parts and certainly no boutique products so I won't comment on initial reproduction quality. It's alive and it works smoothly, not bad for a days work.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Somehow PSUD simulated out of the ballpark. I use a voltage doubler which was calcutated for 480V but the thing delivers 530V. Of cause this strains the capacitors on the raw voltage so I had to series connect some, this not the way I normally work things out. The PSU has low capacitance and gives almost 2V ripple which is swamped by the regs to less than 1mV (on the Fluke that is).
An externally hosted image should be here but it was not working when we last tested it.
Promising design Salas, I like it and will like it more once built to higher standards.
reg questions
I have been following this thread on and off for a while. Salas et al, I have a few questions:
I gleaned from the responses to Buzzforb that the circuit sounds best with 2X the Salas SSHV2 instead of the Maida referenced on the schematic?
Buzzforb mentioned effects on his heater voltage due to something he did to the SSHV2 (it was late when I read this). Was he talking about the LV Salas regulator or just the regulated heater circuit shown on the schematic?
I have just in the last week become aware of the group buy for the SSHV2, which is already closed but I see that some Johnny-come-latelys have been advised to contact Teabag anyway – which I plan to do. Here is my question – is the SSHV2 the same as the circuit shown by Salas in his link to Maida circuit – or is Salas’ SSHV2 design shown somewhere else? I ask in case I cant get boards from Teabag.
Salas – this thread really makes me want to build this circuit. 😉 In fact, I have been thinking about trying to figure out how to combine it in one box with DanL’s version of Hagerman’s octal coronet phono circuit.
regards
mike
I have been following this thread on and off for a while. Salas et al, I have a few questions:
I gleaned from the responses to Buzzforb that the circuit sounds best with 2X the Salas SSHV2 instead of the Maida referenced on the schematic?
Buzzforb mentioned effects on his heater voltage due to something he did to the SSHV2 (it was late when I read this). Was he talking about the LV Salas regulator or just the regulated heater circuit shown on the schematic?
I have just in the last week become aware of the group buy for the SSHV2, which is already closed but I see that some Johnny-come-latelys have been advised to contact Teabag anyway – which I plan to do. Here is my question – is the SSHV2 the same as the circuit shown by Salas in his link to Maida circuit – or is Salas’ SSHV2 design shown somewhere else? I ask in case I cant get boards from Teabag.
Salas – this thread really makes me want to build this circuit. 😉 In fact, I have been thinking about trying to figure out how to combine it in one box with DanL’s version of Hagerman’s octal coronet phono circuit.
regards
mike