CurtPalme.com Home Theater Forum

[Boilermaker]

You got to check this out - http://sound-smith.com/cartright/index.html

While a little pricey, the software version looks like a reasonable price if it actually works!

[Nashou66]

yeah I saw that. I have the Analog productions test LP that your suppose to use with a Scope. I need to try it out some time.

Athanasios

[Boilermaker]

They are a full year behind bring it out, but I will get the software version when they do. It must use the analog input of a sound card to get the signal if I had to guess. I sent them my old Supex a few weeks ago for replacement of the stylus as my grandchildren broke it, so I want to set it up as well as possible.

[stridsvognen]

I have tried looking my scope while adjusting my pickup, and i'm quite sure that it can only be some sort of really rough adjustment. compared to what you will be able to hear. Maybe you can bring down the time needed for get it all adjusted, depending how good you are at adjusting by ear.

What i found almost everyone doing wrong with MC pickups, is the impedance load. Try start with a load around 4x the coil impedance.

If your coil impedance/ resistance is 14 ohm.. try load it around 50 to 56 ohm. Not many stepup go that low today, but its easy fixed.
just put a resistor in parallel on the input, from ground to signal.

When you get that one about right it will be much easier to hear a consequence of you other adjustments.

Notice this is only for MC pickups, and wont work with MC stepup transformers.

[Boilermaker]

[stridsvognen]

A capacitor will for sure tame your hight rise, or cut it off. The rise is distortion, and is due to bad tracking, caused by maybe many things not matching. first to be able to track high frequency you will ned a very sharp stylus with low mass, and a high compliant system.

If you don't have that, the cut off is the bast way not to hear it, but bad tracking will still destroy your records.

I'm curious what pickup arm and player your using.? and type of stepup. If you don't mind to share.

[Boilermaker]

All my vinyl stuff is just like me -OLD!

My favorite cartridge is an old Supex, while later became the Koetsu Rosewood. My grandchildren accidentally bent the stylus, so it is currently at Soundsmith's getting a new ruby with line tip installed. Temporarily I am using a GAS Sleeping Beauty and a Fulton until I get my Supex back. Yes, they are also old!

Tonearm is a Dynavector DV505 and the TT is the original Technics SP10 with onyx base.

SInce I just recently got back into vinyl, I was going to use the tube preamp that I scratch built many years ago using Curcio's "Daniel" circuit with a separate pre-preamp also of his design.

Unfortunately, many years ago, I stole the pre-preamp board to incorporate as an I /V converter in a D/A converter I built, so I just recently bought a decent little solid state MM/MC preamp and made significant changes to it as it needed a little help.


Bob

[stridsvognen]

[Nashou66]

I Still love my basic AR XA turntable with upgraded Linn LP 12 springs and the Cheapo Dennon 110. I need to load it tho to 8k and not sure what my HH Scott 299C phono section is at.

I also have a Acutex M312 STR MM cart that is not too shabby for a MM, it does some things better than the Denon 110.

I need to send my Sumiko EVOIII to Soundsmith as well but they never returned my E-mails. Bob , did you call them or was it done via E-mail?

Athanasios

[Boilermaker]

While the very short pivot system used on the 505 will obviously have greater change of the VTA on imperfect (warped) records, the SRA should be more precisely controlled because of the greatly reduced vertical mass inertia which will reduce the amount of stylus deflection vertically and allow the vertical arm section to move instead - or at least that's what I am hoping for. This effect would be dependent on the compliance of the stylus, but since I will be getting the Contact Line tip on my rebuild, I am more concerned with SRA as I have been told by Soundsmith's that it becomes critical with this shape.

One thing is for sure - I'll find out hopefully in a few weeks!

Bob

[Boilermaker]

I did all the ordering on line. They will almost never respond to an email. Once you place an order, you will receive all the info you need.
Within a day after they receive your cartridge they will inform that they received it and they will not contact you again until they either have a problem, or they are ready to ship back to you.

It all take a couple of months!


Bob

[Boilermaker]

Nash,
Your Scott will have a 47K

[Boilermaker]

Damn - I'm all thumbs.

Your Scott will have a 47K ohm resistor on its phono input unless it has a MC input in which case it would be substantially less.


Bob

[Nashou66]

It has a low and a High , I forgot what it says either MM or MC or Both. Old eyes.

How can i use regular resitors , say on the cables, to load the cart for what I want. They say my Denon DL110 needs about 8k load.

Nashou

[Boilermaker]

One of the inputs will have a 47K ohm resistor from the signal to ground as soon as it enters the chassis and this will be for a MM or high output MC.
The other one (which probably feeds an additional gain stage) will have a lower resistance and be suitable for a low output MC. If your cartridge is a low output, then feel free to change that resistor to match your cartridge.

My guess is that given the age of your Scott, it probably also has an input labeled "tape head". This was used for direct connection with the low output of a RTR tape head and has similar gain to a MC phono input, but just has a different frequency shaping network than the RIAA used for LP's.

Bob