Are those ZMF Bokeh headphones?
Yes they are, listening to Atrium closed while listening in this picture, both great headphones!
Are those ZMF Bokeh headphones?
I’m getting Metropolis movie vibes from your amp…Glad I could help @Nayyte .
I went from cap in the signal path battery bias back to battery in the signal path battery bias. No doubt battery in the signal path is better, dramatically. I thought I was getting over my capacitorphobia but I think it's here to stay.
I've been pretty busy lately, so haven't had much to update on, but here's where I'm going next.
The EAD-DSP 7000 I picked up is on it's way to Noble Electronics for a internal refurbishment, looking forward to getting that back and permanently into my two-channel system.
Dave Slagle is going to wind me a new pair of output transformers for my HY69 headamp. While I really like the sound of the amplifier as is, the transformers were not specifically wound for this type of circuit. They work well but are not optimized, and seeing this is going to be my main amplifier going forward, it really needs to be perfect in my mind. So new transformers it will be. What to do with the existing transformers, which as I've said belong in an Aegis or Aegis-like circuit, is to be determined.
Since Dave is already winding me some output transformers, I've decided to go all in for my LCR phono stage: he is going to wind me a pair of MC step-up transformers as well. As such, I am going to start working on my phono stage in earnest since very soon I will have everything I'll need for the build. Rather than a two-chassis design, I've decided I'm going to do a single chassis with a divider in between the power supply and signal portions. That is in part due to the nature of the high transconductance tubes being used, each will require its own dedicated DC heater regulator, which makes the practicality of using a two-chassis solution with an umbilical very low. I will use Toroidy again for a custom toroidal power transformer. The power supply will be dual mono with each channel having its own B+ regulator.
This is going to be a complex build. It very well may be the most expensive single audio component I've ever made given the custom iron going inside: Slagle MC SUTs, LCR inductors, and two sets of interstage transformers.
Here's the most updated schematic. Should be one heck of a piece of gear and a phono worthy of use for the rest of my life! I've been collecting tubes and parts for this build for around two years, finally time to build it.
That is excellent. A high quality tube phono stage to replace my 20+ year old EAR 834P is on my list of eventual projects. I'll look forward to seeing how this turns out.
If budget allows, might I recommend going with silver windings. Slagle accidentally wound a copper primary and silver secondary for a friend of mine and you can see how even that out-resolved Slagle’s copper only SUT. Another friend who has heard the full silver, says it is among the best SUT he has heard and is worth every penny.Slagle MC SUT
If budget allows, might I recommend going with silver windings. Slagle accidentally wound a copper primary and silver secondary for a friend of mine and you can see how even that out-resolved Slagle’s copper only SUT. Another friend who has heard the full silver, says it is among the best SUT he has heard and is worth every penny.
https://www.superbestaudiofriends.o...stin-mini-meet-impressions.13465/#post-408708
Welcoming you soon to the LCR world. Mick from Supratek says the Grange LCR is the best he can make, so I really think I have my last phono stage. Obviously would love to hear yours as well.I've been pretty busy lately, so haven't had much to update on, but here's where I'm going next.
The EAD-DSP 7000 I picked up is on it's way to Noble Electronics for a internal refurbishment, looking forward to getting that back and permanently into my two-channel system.
Dave Slagle is going to wind me a new pair of output transformers for my HY69 headamp. While I really like the sound of the amplifier as is, the transformers were not specifically wound for this type of circuit. They work well but are not optimized, and seeing this is going to be my main amplifier going forward, it really needs to be perfect in my mind. So new transformers it will be. What to do with the existing transformers, which as I've said belong in an Aegis or Aegis-like circuit, is to be determined.
Since Dave is already winding me some output transformers, I've decided to go all in for my LCR phono stage: he is going to wind me a pair of MC step-up transformers as well. As such, I am going to start working on my phono stage in earnest since very soon I will have everything I'll need for the build. Rather than a two-chassis design, I've decided I'm going to do a single chassis with a divider in between the power supply and signal portions. That is in part due to the nature of the high transconductance tubes being used, each will require its own dedicated DC heater regulator, which makes the practicality of using a two-chassis solution with an umbilical very low. I will use Toroidy again for a custom toroidal power transformer. The power supply will be dual mono with each channel having its own B+ regulator.
This is going to be a complex build. It very well may be the most expensive single audio component I've ever made given the custom iron going inside: Slagle MC SUTs, LCR inductors, and two sets of interstage transformers.
Here's the most updated schematic. Should be one heck of a piece of gear and a phono worthy of use for the rest of my life! I've been collecting tubes and parts for this build for around two years, finally time to build it.
I've had a Benz LP-S for the longest time, but I wouldn't mind trying a different cart as well sometime. Let me know what short-list you come up with.I'd probably rather spend that on a new cartridge.
Welcoming you soon to the LCR world. Mick from Supratek says the Grange LCR is the best he can make, so I really think I have my last phono stage. Obviously would love to hear yours as well.
I've had a Benz LP-S for the longest time, but I wouldn't mind trying a different cart as well sometime. Let me know what short-list you come up with.
It's the best way I also have four tubes in the power supply chassis.So I changed my mind, going to do a two-chassis solution for this phono.
Here's my first draft of the signal chassis layout, dimensions 15.5" x 10" x 3.25". Planning to put the heater regulators in the power supply chassis (there will be four of them). I'll run the outputs of those through the umbilical and have some high and low frequency decoupling at each tube's individual heater. For the B+ regulators, will run choke-filtered raw DC through the umbilical and then have the regulators right at the input of the umbilical (red blocks). I need to design a small PCB for the remainder of the RIAA filter components that will mount in the center of the LCR chokes. Signal flow will be front-to-back: 3-pin XLR inputs (magenta blocks) > MC SUTs (green blocks) > D3a stage > LCR RIAA > E55L > RCA outs.
I feel good about this draft, came together quicker than I thought it would. Will stare at this for a few days and work out any kinks, then power supply chassis.
It's the best way I also have four tubes in the power supply chassis.
Are you also cutting these yourself? If so, what type of equipment do you have?So I changed my mind, going to do a two-chassis solution for this phono.
Here's my first draft of the signal chassis layout, dimensions 15.5" x 10" x 3.25". Planning to put the heater regulators in the power supply chassis (there will be four of them). I'll run the outputs of those through the umbilical and have some high and low frequency decoupling at each tube's individual heater. For the B+ regulators, will run choke-filtered raw DC through the umbilical and then have the regulators right at the input of the umbilical (red blocks). I need to design a small PCB for the remainder of the RIAA filter components that will mount in the center of the LCR chokes. Signal flow will be front-to-back: 3-pin XLR inputs (magenta blocks) > MC SUTs (green blocks) > D3a stage > LCR RIAA > E55L > RCA outs.
I feel good about this draft, came together quicker than I thought it would. Will stare at this for a few days and work out any kinks, then power supply chassis.
Are you also cutting these yourself? If so, what type of equipment do you have?