Phono stage input capacitance list.

[mdewire]

McIntosh C2500 Phono preamps are adjustable on the fly by remote control. Parameters listed below. With my present cartridge which is an Ortofon 2M Black 100pf sounds the best.

Phono MM, 47K ohms; 50 to 750pF, in 50pF steps
Phono MC, 25, 50, 100, 200, 400 or 1,000 ohms;
100pF

 

[SupaWales]

Naim NAC62 470pF 62k with NA322 phono preamp boards installed ( Standard MM board supplied with the NAC62 & 72 unless customer required MC etc.

Yamaha AX 396 & 596 220pf 47k with 220uH damped by 2k2 in series with input before the 47k/220pf load.

 

[surrealust]

Creek 4140S2 loading 47k 200pf. Does anyone know how to lower the loading capacitance?

 

[dtreize]

NAD Monitor Series Preamp Tuner 1600: 47kohm, +100pF. Input sensitivity 1.3mV (MM) or 0.1mV (MC).

 

[BuddhaBob]

The Yamaha C-80 preamp has two MM inputs. One is fixed at 47k/220pf. The other can be any of three choices: 47k/220pf, 100k/220pf, or 47k/330pf, front panel selectable.

 

[royphil345]

Creek 4140S2 loading 47k 200pf. Does anyone know how to lower the loading capacitance?

If you're willing to open the unit and change capacitors, the 200pF loading capacitors are probably right by the inputs on the PC board.

 

[JRSBat]

The Simaudio Moon 310LP has three different capacitive load settings; 0pF, 100pF and 470pF. They are independent of the resistance load settings. You have to remove the cover to change the jumpers.

 

[Bigboi33]

Kenny KA 8300 input capacitance

Hi Folks,

I'm hoping to revive this thread and add more info. However I really suck at reading schematics. Can anyone here help out with trying to figure out the input capacitance for a Kenny KA 8300?

 

[luvthesound]

Question about capacitance and selecting an appropriate cartridge. I just purchased a Dual 1229Q and looking at replacing the cartridge that came with it. I was looking at the M91ED, V15 type III or the M97xE and of course I will be changing out the stylus for either an LPGear VL or a Jico HE or SAS. I have a Sansui G5700 Receiver but not sure after having read some of Catman's other posts if my system will perform well with those cartridges due to the pF. I have attached the schematics if anyone can help me decipher it.

Here are the Schematics for the Sansui G5700.

 

[Redd House]

Vista Audio Phono-2
50pF with internal sockets to add capacitance.

Right now I'm running an AT150Sa which wants to see 100-200pF. I calculate about 20pF on the cables from the TT to pre and about 40pF on the cables from the pre to the amp.
20+50+40=110pF.

 

[BillWojo]

Audio Research SP8 input capacitance is 40pf. Has provisions to add more capacitance as well.

BillWojo

 

[MCM_Fan]

Vista Audio Phono-2
50pF with internal sockets to add capacitance.

Right now I'm running an AT150Sa which wants to see 100-200pF. I calculate about 20pF on the cables from the TT to pre and about 40pF on the cables from the pre to the amp.
20+50+40=110pF.

Perhaps you meant 20pF for the tonearm leads and 40pF for the interconnects between the turntable and the phono stage? Tonearm leads are typically in the 20 - 25pF range and unless your phono cable is 18" long and has no connectors, it's going to be more than 20pF. Typical captive phono cables are in the 80 - 100pF range for 3' or 1m of length. If you have specialty ultra low capacitance cables, like Blue Jeans Cables LC-1, you can get down in the 40 - 50pF range for a 3' pair. The cable between the phono stage and amplifier is not part of the circuit that the phono cartridge sees. You don't need specialized low capacitance cables for these interconnects, any decent quality standard interconnect cable will work fine in this location.

 

[Redd House]

Perhaps you meant 20pF for the tonearm leads and 40pF for the interconnects between the turntable and the phono stage? Tonearm leads are typically in the 20 - 25pF range and unless your phono cable is 18" long and has no connectors, it's going to be more than 20pF. Typical captive phono cables are in the 80 - 100pF range for 3' or 1m of length. If you have specialty ultra low capacitance cables, like Blue Jeans Cables LC-1, you can get down in the 40 - 50pF range for a 3' pair. The cable between the phono stage and amplifier is not part of the circuit that the phono cartridge sees. You don't need specialized low capacitance cables for these interconnects, any decent quality standard interconnect cable will work fine in this location.

Good catch. I forgot to add in the tonearm wires. 1 ft of Mogami to the pre and 2 ft of mogami to the amp. should've doubled it for the pair.
Correct me if my math is wrong
Tonearm 20pF
Pair 1 ft Mogami 40 pF
Pair 2 ft Mogami 80pF
Vista Phono-2 50pF
Total 190pF

 

[MCM_Fan]

Good catch. I forgot to add in the tonearm wires. 1 ft of Mogami to the pre and 2 ft of mogami to the amp. should've doubled it for the pair.
Correct me if my math is wrong
Tonearm 20pF
Pair 1 ft Mogami 40 pF
Pair 2 ft Mogami 80pF
Vista Phono-2 50pF
Total 190pF

Don't double anything. For a stereo cartridge, each channel only sees the capacitance of the cabling for than channel. Also, remove this: Pair 2 ft Mogami 80pF. That's on the output side of the phono stage. The cartridge does not see it. So, ironically, you're right back at the 110pF of your previous post.

 

[Redd House]

Don't double anything. For a stereo cartridge, each channel only sees the capacitance of the cabling for than channel. Also, remove this: Pair 2 ft Mogami 80pF. That's on the output side of the phono stage. The cartridge does not see it. So, ironically, you're right back at the 110pF of your previous post.

 

[ETI_5000]

Question about capacitance and selecting an appropriate cartridge. I just purchased a Dual 1229Q and looking at replacing the cartridge that came with it. I was looking at the M91ED, V15 type III or the M97xE and of course I will be changing out the stylus for either an LPGear VL or a Jico HE or SAS. I have a Sansui G5700 Receiver but not sure after having read some of Catman's other posts if my system will perform well with those cartridges due to the pF. I have attached the schematics if anyone can help me decipher it.

Here are the Schematics for the Sansui G5700. View attachment 1919568View attachment 1919569

Good news - the Sansui has an input capacitance (Left = C05 and Right = C06) for each channel of 100pF.

So it should match virtually any cartridge, assuming the output leads of your 1229Q are low capacitance. I seem to remember that the 1229Q was the quadraphonic model, which would require output lead capacitance of 100pF or less (for CD-4 quad cartridges), so if it has those leads, you'll need to add some extra capacitance to the inputs of the amp (easily done). The capacitance required for the cartridges you mentioned are

Shure M91ED (originally paired with the stereo 1229) and V15 Type III: 400-500pF needed - subtract 100pF for the amp, then subtract the measured capacitance of your turntable output leads, to find out how much extra you'll need to add, to get a flat response from those two cartridges.

Shure M97xE (and all other Shure cartridges released after 1978, including the V15 Type IV): 200-300pF required. So you'll need to add less extra capacitance (possibly none) to the turntable leads and receiver input to get the flattest response from an M97XE or other post-78 Shure (or any Stanton).

If you do have the very low capacitance leads (less than 100pF) that quad turntables typically had, you'll (probably) also be able to choose any Goldring or Audio-Technica MM cartridge , or any Nagaoka MI, as they require 100-200pF.

Note that you do need to measure the capacitance of the turntable leads (without a cartridge connected) to be sure what you need. Many modern digital multimeters (but not the cheapest) often have a very accurate (typically better than 5% accuracy) capacitance range, so if you need to buy one, check that it does have a capacitance range that is good for pF (say up to a maximum of 2nF or 2000pF).

 

[Hawsepiper]

Here is mine for a pioneer sx3400. I believe it's 440? Am I right on that number. Attached is the schematics.