Where can i find fecking affordable decent audio resistors. I started looking out for Dale RN55 1/8W. Found schuro.de but they ask almost €0.90 per piece Easy source farnell only has the HOLCO range in stock, also at €0.75. There should be decent resistors out there for around €0.10, but where, o where?
The only difference between these and normal metal films (apart from stricter tolerance) is the temp coefficient... normal metal films are 50ppm and these are 15ppm so these will perform better if there's a lot of heat in the circuit.
Tell me what you need, I'll order them for you and ship them over, will save you on postage
You're too kind, but don't bother. I'll be ordering a toroidal transformer too and shipping included, it's already cheaper than it would be @ Farnell.
Ok, no worries, glad to have been of assistance. The Vishay resistors are very good and exactly the same specs as the RC55Y... still expensive at 20 pence each but a lot cheaper than the other ones you were looking at
How about MRS25? 0.6W in a 0.25W size. 50PPM, though. Half the Farnell price (miserable buggers apply quantity discount to each value now, not the whole resistor order!) at Rapid!
Huh? Those can only be bought in packages of 100 pieces. Do i overlook something?
Can you REALLY hear the difference between those and the packs of 8 with copper leads that Jaycar sell for AU$.46C a pack, in a well designed,very low distortion SS amplifier using negative feedback ? The types that Mike refers to would be best reserved for areas such as LTP and Current mirror resistors etc. where very close matching is desired.
Marc I find it easier to buy packs of 8 at 46C a pack, and as I have a fairly high accuracy DMM, just select the matching values from the pack.Most 1% MF TH resistor packs that I have used recently are well within the +-1% tolerance. As far as DACs go, the resistors are more likely to have closer tolerance than the DAC output currents, and even areas like the PLL do not need better than that kind of tolerance, especially when associated timing capacitors are usually no better than +-5%. That is another reason why I use polyprops in that area, which are usually +-2%. We aren't talking instrumentation amplifiers here ! Regards Alex
Even finding 1% metal film TH resistors is a pain these days. Local shops are disappearing and most European online shops are only stocking the exotic and expensive species.
About tuning the DAC: it sounds at it best with a specific bias voltage. I don't care if the current output is biased with a 1% I/V resistor, but 5% would be no go for me. And it can get hot with 24x 1543's, so temp stability is also an issue.