Q: I want to use another external step-up transformer. Can I run it into my CHINOOK with the load set for 47 kOhms?
A: Sure thing! You can totally run an external MC step up transformer and run that into the CHINOOK input and set the load for 47 kOhms and set the GAIN to probably the lower setting.
Q: I have an XYZ Model Blah Blah cartridge. Where do I set the loads? Is it an MM or an MC cartridge? Where do I set the GAIN?
A: GAIN is GAIN. It doesn't care whether it is an MC or MM cartridge or an external step up transformer. Usually MM cartridges are going to be on the lower gain settings, like around 40dB of gain in a phono stage, and MCs on the higher gain settings, like around 60dB of gain.
Usually you'll see MM cartridges with a typical output of 1 milliVolt. MC cartridges maybe typically have about 0.5 milliVolts, for example. You'll have to see you much gain you need in your system and set the GAIN for as little as you can get away with. If you have cranked your preamplifier's Volume Control all the way up and you still can't play loud enough, then switch the GAIN up on your phono stage. What you don't want is MAX GAIN (and MAX NOISE) in your phono stage and then you line stage's Volume Control is barely cracked open at 9 o'clock.
LOADING also, doesn't care where you set the gain. You can set the loading for any cartridge or external step up transformer wherever you want to. You will never harm anything or blow anything up. The loading resistor helps damp high frequency resonances of cartridges (and other inductors). Adding capacitance to low impedance cartridges will have no audible effect. Most MM cartridges are going to require a standard 47 kOhms resistive load setting with some capacitance added in parallel with the resistor. You would ultimately also want to add the cable capacitance in your calculations. Read your Manley CHINOOK Owner’s Manual as there is lots of info about this topic in your manual!
Always refer to your cartridge manufacturer's website or owner's manual for the suggested load and then set your Manley phono stage to that load setting or as close to it as possible.
"DC Resistance" and "Internal Impedance" refer to the measurement of the winding inside the cartridge and that is NOT what the recommended load setting is.
If it is not clear on the cartridge maker's website or owner's manual what the Recommended Load for their cartridge is, please contact the cartridge manufacturer and have them clarify what the recommended load for their cartridge is. We are not going to know that! We would have to Google it just like you will. But we can provide lots of choices and flexibility to set the load close to what you need.
And again, being exactly on the number they suggest or being a few Ohms different is not going to make or break anything. All of these load settings have a very very subtle effect and they are difficult to even hear sometimes.
So relax, and listen, and enjoy your music!
Q: Hey! I get a loud POP or BANG noise through my audio system! It is random. What's wrong with my phono stage making this noise?
A: It's not the phono stage making any noises. We have seen this over and over when static on the acrylic turntable platter builds up and has nowhere to go except through the cartridge and through the CHINOOK into the rest of your hifi system eventually getting amplified by everything until you hear it through your speakers. This is not a problem with the Chinook. It is just amplifying what is being sent to it. It is just doing its job.
You have got to get a ground to the platter somehow so that your Van de Graaf generator has a place to discharge to besides through your audio system. See if you can get a ground wire to the center spindle housing, maybe under the spindle bearing of your turntable. Contact your turntable manufacturer asking them how to get the static that builds up on the platter to dissipate through a ground wire instead of through your cartridge/audio path! Note: we have seen this happen more often with the Hana SL cartridges than any other brand perhaps due to the Hana’s ABS plastic body that also allows the static to build up on it and not dissipate through any ground path. Or it might because it is very popular.
Another idea is to purchase this AcousTech Big Record Brush with Grounding Cord, ground the brush with the ground wire, and run it over your record and turntable to remove static before you play each record, especially in dry climates and low humidity winters.
Q: My unit inside looks different from the picture. Which ones are the input tubes?
A: Later models have the main audio PCB rotated 90º CCW so that the input tubes are located on the left side of the unit, not towards the back. This keeps both input tubes more equidistant and furthest away from the power transformer for slightly improved noise level. The 6922 input tubes are nearest to the GAIN select switches. You can follow the wiring from the INPUT RCA jacks to the INPUT tubes. The output tubes are closest to the big giant white output capacitors and you can follow the OUTPUT cabling from those capacitors to the OUTPUT RCA jacks.