You're welcome.
They certainly seem to be, but that aren't all equal. The ones I linked are good ones 🙂
They certainly seem to be, but that aren't all equal. The ones I linked are good ones 🙂
Question for Koda:
What gain does your Phono circuit have. I am looking for 50 - 60 db for my MC set up.
Thanks
What gain does your Phono circuit have. I am looking for 50 - 60 db for my MC set up.
Thanks
In theory it's about 45 or so I think. A 4mV MM cartridge will hit 3VU on a 12" 45, and about 0VU on the average LP. 0VU is 1.228VRMS. If more gain is needed, the input tube can be replaced with a 6N2P (and different cathode resistors) to increase the gain.
I just few days ago put on simulator the RIAA of kodabmx and is 42 dB with 6N23P as input and 48 dB with 6N2P as input.
to SCD:
is very difficult reach 50-60 dB on RIAA pre-amp. without severe noise problem, unless you insert a step-up transformer like the Lundahl 9206 on the input that is specific for MC cartridge....all the best
to SCD:
is very difficult reach 50-60 dB on RIAA pre-amp. without severe noise problem, unless you insert a step-up transformer like the Lundahl 9206 on the input that is specific for MC cartridge....all the best
Thanks guys about the phono pre-Amp;
I am going the right route in building an op amp based unit. My MC Cartridge is only 0.2mV output.
Sorry to plug up the thread
I am going the right route in building an op amp based unit. My MC Cartridge is only 0.2mV output.
Sorry to plug up the thread
Thanks Koda:
I decided to go with an "Emerald" from RJM audio. Should have it up and running in a few weeks
I decided to go with an "Emerald" from RJM audio. Should have it up and running in a few weeks
Cleaned up my Kedvesem (Darling in Hungarian): added a choke (monyed om the underside, stuffed another potentiometer in (could have been a 100K, but all I had was a 22K), fixed the pilot light (no big blue LEDs at home ...🙁), installed an IEC connector.
Else it is much original shape - DIYtubes/Tom McNallys PCB, 1626 triodes and a 6SL7 as driver. All transformers are Banbury's (now discontinued). Even the choke is Banbury's.
Else it is much original shape - DIYtubes/Tom McNallys PCB, 1626 triodes and a 6SL7 as driver. All transformers are Banbury's (now discontinued). Even the choke is Banbury's.
Attachments
That's another good looking amp! Good reason to have the Photo Gallery.
Share the schematic on another thread.
Share the schematic on another thread.
Here's one. This bugger used to be a KT88 push-pull triode connected class A thing I built almost a decade ago for a friend. And now it's come back home. And since I saw no use for it as it was, I decided to give it a remake. Now it's an EL34 UL AB1 PP, first of a pair. Not exactly the prettiest amp I've ever built, but hey! They were originally built in this color as per what the "customer" wanted... The other one (on the left side of the image) is a KT66 PP lab prototype, though when the picture was taken it was running GE 6L6GC's...
The innards are a bit messy, reflecting the much more complicated front end this modified thing has compared to what it was before... It's just a 6U8A pentode/triode connected as a VAS + cathodyne, but stuffing around 20 components where there were originally just a handful was really a, well, a handful...
The innards are a bit messy, reflecting the much more complicated front end this modified thing has compared to what it was before... It's just a 6U8A pentode/triode connected as a VAS + cathodyne, but stuffing around 20 components where there were originally just a handful was really a, well, a handful...
Attachments
perhaps a stupid question but,
those components on the right side of the chassis....
Capacitors?
