We will see…. I do not know my final outcome, but I'll have some reduction at 20Hz (probably 2-3dB) based Linkwitz classic slop. My goal is to keep all audio in and to remove/reduce useless for audio signal. -3 or -6 dB will be tested after filter installation into my Sub.
Is the cart's body grounded to the TT chassis? See there is DMM continuity from its body screws to the phono chassis. Up the Rs resistors by adding about 3 Ohm value on each then set tp again. If its still not giving less susceptibility results, get 1uH inductors (they look like 0.25W resistors) and/or ferrite rings to intervene on the signal hot nearest to pcb.
The reading are kind of jumpy...I see about 9 (1st screw) and 12 (2nd screw) Ohms between screws and FSP chassis. Between screws is 5.3 Ohm.
Is it normal?
Let's do step by step.
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Yes, it is buzz, between screws and FSP chassis. However, no continuality to TT metal parts. These are no much metal parts on it, but they insulated from GND wire.
Yes, but some parts are Stainlessstill. I do not see any connectivity even beteen them.
OK. Make K369 Rs resistors higher like I described when you get the chance, so little more self feedback makes the input stabler against RF although the RF to chassis capacitors already seem to have worked when TT cables are grounded to FSP not creating antenna with the cart's coils like when free and touching their barrel. Are those TT cables shielded in coaxial manner BTW?
I'll try your advice tomorrow. WB TT uses Cardas cable looks like 4 (L+R and two returns) slightly twisted wires plus cooper braid around which is TT GND that I connects to FSP chassis.
I see. I use 8.2 Ohm now calculated for 13.49/13.53 IDSS on Q1 and Q2.
The close value that I find in Mouser is 11.1 Ohm Vishay RC55 1/8W (0.1% 22ppm/C). It is OK for W rating?
I'm sure that rectifier’s MAX current rating is important to meet the min requirement of the load. I use 22A Fred diodes (bridge) when min requirement is about 1A.
