Moderator: dante
arnoldc wrote:Doc, couple of Qs-
Which version of Cinemag is this?
The CMQEE-3440A is specified at 37.5,150,600 : 50K which translates to 1:36.5, 1:18.3 and 1:9.1
The CM-75101A is specified at 150,600 : 15K which translates as 1:10 and 1:5
The CMQEE-3440APC is specified at 150,600 : 50K also translates to 1:18.3 and 1:9.1
The CMMI-10C 150 : 15K and translates to 1:10
What led you to this model of Cinemag?
Why 62dB min for low-output MC? At what cartridge output range? 0.2, 0.3, 0.4, 0.5, 0.6?
How did you go about the matching? Are you feeding a Cornet? Rather, what is your MM stage? What gain does it have? What is your linestage? What gain does it have?
Cheers!
ps.
You don't need PCBs (although they will look nice) for Lundahls. I've worked with them *without* a PCB.
What led you to this model of Cinemag?
What led you to this model of Cinemag?
How did you go about the matching? Are you feeding a Cornet? Rather, what is your MM stage? What gain does it have? What is your linestage? What gain does it have?
ps.
You don't need PCBs (although they will look nice) for Lundahls. I've worked with them *without* a PCB.
There's not a single issue about proper loading, and we all agree to this. But for some who has not explored it yet, may blame the table , the phonostage , the cart as the culprit for some nasty sound when in fact it's just a simple issue.
arnoldc wrote:Doc, my cart is 50ohm, 0.6mV output. My lair?? Baka my bodega Walang problema doc. Just let me know.
Abe, ayan naman pala eh. Same model of Cinemag? Di ba may hex nut yan for mounting?
Abe, ano iyung kulay blue sa mounting? Kabit na kaagad at makinig.
garp wrote:Hi,
MC newbie here. Just have a question and I hope this is the proper forum. I have Cinemags enroute but my question is applicable to any SUT.
For the cinemags I'm looking at the 1:18 tap. With my MM input impedance set at 51.1K, the load seen by the catridge is about 158R.
But if I want to play around and want to bump that up to say 1K, it means I need my MM input impedance to be 324K (=1K x 18^2). Now I can't parallel a resistor to the 51.1K to get that figure which is usually the method if you want a lower load than the 'natural load' for this tap.
My question is, can I just replace the 51.1K resistor with a 324K (or close) resistor get my desired load? I haven't seen anyone do this or mentioned it before in other forums or tutorials on the subject so am asking here.
Thanks and thanks for the tip on cinemags.
garp wrote:Hi,
MC newbie here. Just have a question and I hope this is the proper forum. I have Cinemags enroute but my question is applicable to any SUT.
For the cinemags I'm looking at the 1:18 tap. With my MM input impedance set at 51.1K, the load seen by the catridge is about 158R.
But if I want to play around and want to bump that up to say 1K, it means I need my MM input impedance to be 324K (=1K x 18^2). Now I can't parallel a resistor to the 51.1K to get that figure which is usually the method if you want a lower load than the 'natural load' for this tap.
My question is, can I just replace the 51.1K resistor with a 324K (or close) resistor get my desired load? I haven't seen anyone do this or mentioned it before in other forums or tutorials on the subject so am asking here.
Thanks and thanks for the tip on cinemags.
Jon Agner wrote:garp wrote:Hi,
MC newbie here. Just have a question and I hope this is the proper forum. I have Cinemags enroute but my question is applicable to any SUT.
For the cinemags I'm looking at the 1:18 tap. With my MM input impedance set at 51.1K, the load seen by the catridge is about 158R.
But if I want to play around and want to bump that up to say 1K, it means I need my MM input impedance to be 324K (=1K x 18^2). Now I can't parallel a resistor to the 51.1K to get that figure which is usually the method if you want a lower load than the 'natural load' for this tap.
My question is, can I just replace the 51.1K resistor with a 324K (or close) resistor get my desired load? I haven't seen anyone do this or mentioned it before in other forums or tutorials on the subject so am asking here.
Thanks and thanks for the tip on cinemags.
Garp,
While I haven't tried SUTs for my MC, I did add resistors to fine tune the load for both my MM and MC inputs. The way I understood cartridge loading, theoretically, replacing it with another resistor that will match the desired load would be correct. Problem lies when you decide to use another cartridge that requires a different load. You will again have to replace the resistor.
What I did with mine was to use dip switches for the resistors. That way, I can to use the preset 47K load or toy around with different loads when I install a different cart.
Hope this helps.
garp wrote:Amandarae, gee, thanks for taking the effort to explain. I sort of gleaned as much that increasing the value of my MM's input impedance is not a good idea though I couldn't get a definitive answer why. I've searched through many forums and I've yet to encounter a recommendation to do that. I thought the 47K was arbitrary as far as the MM circuit is concerned but is chosen primarily to match MM carts recommended load. After all, I thought, why is it ok to adjust it lower (via parallel resistors) but not higher? It's not as if its part of the EQ, right? I'm not sure, just thinking out loud.
I just read through the setup tutorial at VinylEngine and the bottomline is...as Jon Agner here suggests...to use an active stepup instead if I want 1K loading:-). I have my eyes on Hagtech's Piccolo if ever.
You're suggestion of using 4 transformers is a bit of a stretch for me moneywise. And at 1:6 ratio, assuming I can get full output from my cartridge at 0.3mv, that only comes up to about 16db at best, if I'm not mistaken. With my 40db gain MM stage, I think I won't have enough gain.
Lots of AA inmates praise the DL-103/Cinemag combi, a lot of them preferring the 1:36 at ~40ohm load to the 1:18 tap. Of course Ill try both configs but I just want to mess around with the loading to satisfy my curiousity.
garp wrote:.... I thought, why is it ok to adjust it lower (via parallel resistors) but not higher? It's not as if its part of the EQ, right? I'm not sure, just thinking out loud..
garp wrote:Just an update. Finally done with this although I'm waiting to get clamp to mount the transformers properly. Total cost is P6.4k, including suts, rca jacks, box and spray paint.
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