Other I/V resistor options:
Rhopoint General Resistance GG102 or GR102 (non-RoHS compliant), which is a noninductive wirewound resistor. 0.6mm (22 AWG) wire of the "highest quality copper alloy drawn from
melts of known resistivity and controlled temperature coefficient". The standout spec is "Noise Immeasurable". The "D" version with +/-0.1% should be just fine (to get the cost down). I think these need to be purchased directly from Rhopoint. Made in the UK. Not sure yet where to buy them or the price.
Update: Based on a 2021 diyA Group Buy thread, minimum order $250 and each resistor about $12.50 USD. Cost is probably about the same as TX2575.
Knockoff GG102 by RARA South Korea. Inquiry emailed.
RMS South Korea. Appears to be a distributor for RARA. Inquiry submitted.
Newark has the 8G16D axial Econistor in limited values. Closest value is 350 ohms. $8.78 USD each. Not in Stock. Manufacturer Standard Lead Time: 17 week(s)
Newark has the 5G10D axial Miniohm in 350 ohm in stock. 250mW rating. About 8mm length and 4mm diameter. $11.02 USD each plus $9.99 shipping.
Manganin (84.2% copper, 12.1% manganese, 3.7% nickel alloy) "roll your own" resistors. The wire is available from eBay Eastern Europe (Ukraine - "This package may be delayed due to shipping carrier service disruptions."). Not inexpensive. Should be wound in a noninductive pattern such as bifilar or Ayrton–Perry. The smaller diameter wire has the highest resistance per meter. These are supposed to be very low noise to no noise. Beyond my capabilities.
Rhopoint General Resistance GG102 or GR102 (non-RoHS compliant), which is a noninductive wirewound resistor. 0.6mm (22 AWG) wire of the "highest quality copper alloy drawn from
melts of known resistivity and controlled temperature coefficient". The standout spec is "Noise Immeasurable". The "D" version with +/-0.1% should be just fine (to get the cost down). I think these need to be purchased directly from Rhopoint. Made in the UK. Not sure yet where to buy them or the price.
Update: Based on a 2021 diyA Group Buy thread, minimum order $250 and each resistor about $12.50 USD. Cost is probably about the same as TX2575.
Knockoff GG102 by RARA South Korea. Inquiry emailed.
RMS South Korea. Appears to be a distributor for RARA. Inquiry submitted.
Newark has the 8G16D axial Econistor in limited values. Closest value is 350 ohms. $8.78 USD each. Not in Stock. Manufacturer Standard Lead Time: 17 week(s)
Newark has the 5G10D axial Miniohm in 350 ohm in stock. 250mW rating. About 8mm length and 4mm diameter. $11.02 USD each plus $9.99 shipping.
Manganin (84.2% copper, 12.1% manganese, 3.7% nickel alloy) "roll your own" resistors. The wire is available from eBay Eastern Europe (Ukraine - "This package may be delayed due to shipping carrier service disruptions."). Not inexpensive. Should be wound in a noninductive pattern such as bifilar or Ayrton–Perry. The smaller diameter wire has the highest resistance per meter. These are supposed to be very low noise to no noise. Beyond my capabilities.
Hardware: RPi Zero W | Allo Kali | ProtoDAC TDA1387 X8 | PGA2311 | Icepower 500ASP | Harbeth SHL5
Software: Moode 8.3.3
Source: Win 10 NAS
Software: Moode 8.3.3
Source: Win 10 NAS
