With snowy weather making it's first appearance, I finally found some time to install this 24 step 4 wafer shunt attenuator from hifi collective. More specifically, It is an obsolete Audio Note switch, 4 Vishay VAR thin foil load resistors and 92 takman mox to ground. The last position is open throttle 0R. My favorite preamp is now, well even more favorite. Depth and transparency across the range of frequency is what I'm noticing vs the alps. I'm also noticing greater detail in certain passages. Striking difference really.
collective
Hope your back is fine again!
Any good news?
I would like to make a nice x-mas gift for myself 
Any good news?
I would like to make a nice x-mas gift for myself
remind me - good news about?
ZM sorta Omniconfused, Omnilostinspaceandtime
I mean, more than usual
ZM sorta Omniconfused, Omnilostinspaceandtime
I mean, more than usual
Well, I ordered an SE essentials kit with Cinemags to feed my Hafler 9270 Dunlavy SM-1 rig. So, I will have 1.5 in total. I realize replacing iron on the boards is not pleasant, but If I tune up the Hakko FR-301 and go slow, I'm thinking I will have good success replacing Jensen with Cinemag on the Susy.now, make another one, with Cinemags
and you'll have two
Peace
Good news about getting boards and so on for the balanced Tankaremind me - good news about?
ZM sorta Omniconfused, Omnilostinspaceandtime
I mean, more than usual
But I also could ask Marvin
It actually has created a depth of beautiful sound that has me going through my catalog and hearing new things in a lovely way. All hail the shunt attenuator. Tis a beautiful thing. As are thin foil. Peace 🤡just make 3rd
It's fun to be a clown 🤡. Thin foil. Z foil or whatever vernacular, when placed in a few areas, they have made a profound difference in my world. But I listen to speakers individually tuned in an anechoic chamber for phase and time coherence. First order.
Z foil load resistors with takman mox shunt to ground has been a game changer. The depth of .music from top to bottom and perfectly soft detail is astounding. I stay up all night astounded... I kid you not.
Where did you use the Z foil resistors? I know you said load resistors, but that doesn't mean much to me.
I finished my Iron Pre "SMD" SE build. I bought the SE bundle from DIY Audio Store, thus with Cinemags. Everything measured fine: steady (positive and negative) 15V0 rails, offset nulled and 14mV across R34 and R37 as indicated in the schematic. It has been running in for about a week now, but to my ears the LF (still) sounds somewhat rolled off compared to my previous setup. Is this normal or is there something wrong?
Attachments
if everything done by the book, something was wrong with your previous setup
maybe you still have something wrong with rest of system
be sure that Iron Pre is flat enough in entire hearing range, be it level or phase
though ............. those fat coax cables ......... ZM screeching ......... what vol pot value you're using there?
My previous setup was far from perfect, but the bass always sounded quite natural to me, not bloated or overemphasized.
Those thick cables are not coax, but Sommer Albedo shielded interconnect cables; pot is according to BOM Alps blue velvet 10K. I had some difficulties soldering a number of the transistors, which might have become rather hot. I don't know if that can cause problems (they apparently work fine)?
Those thick cables are not coax, but Sommer Albedo shielded interconnect cables; pot is according to BOM Alps blue velvet 10K. I had some difficulties soldering a number of the transistors, which might have become rather hot. I don't know if that can cause problems (they apparently work fine)?
if static measurements are fine (rails, buffer Iq, offset), no reason to doubt basic functionality
anyhow, more details (about rest of your system) could help ........
again, if Iron Pre us assembled by the book, I'm doubting everything else
it's made to have all impedances optimized and more than sufficiently linear
anyhow, more details (about rest of your system) could help ........
again, if Iron Pre us assembled by the book, I'm doubting everything else
it's made to have all impedances optimized and more than sufficiently linear
My old setup was a Denon PMA360 integrated with Infinity RS20 speakers. New setup is apart from the Iron Pre a F5 turbo v.2 (with DIY Audio PCB's and transistors), I posted about that before because of a groundloop hum, and DIY TL speakers with a ridiculous low efficiency of 81 dB. But a swaped those out with my old speakers and still had less bass than when driven by the Denon. Rest of my system is the same as before: Rega Dac mk.1, Cambridge Audio CXC CD transport and my DIY Lenco/PTP turntable.
