Pars

WTF? Nice 3rd post... And I see a new high low... listing fuses in your fucking sig

Yes, but they are big...

Those would fit right in with the 6x18ga Jena strand per channel LOD Double-secret braided, of course

Oh yeah, FETs... guess I missed that. No you can't do those with an hfe tester. That will teach me to respond to stuff while I am working (work work).

Happy Birthday!

It depends. It is best to match at the Ic that the devices will be running at. Obviously a handheld DMM matches at a fixed (very low) current... you aren't going to match Dynahi output devices at 85mA on it for example. The manual may state the parameters for the hfe test. I trust them and they seem to correlate pretty well with stuff I have matched using two meters and a bench supply for small signal transistors.

Matching. hfe is the DC current gain (ratio of Ic and Ib). Matching for hfe and vbe (which is usually the same on linear transistors) gives a pretty good match. Temps of the devices need to be the same, etc. while doing this, but a meter that does hfe will get you much of the way there.

I thought I'd see this post the day after ChiUnifi. Congrats, hope you enjoy them as much as you were then!

Congrats A1!

I don't know that you could come up with a characteristic impedance that would cover all RCAs. The spdif standard is 75 ohms, but if you changed the transmitter and receiver matching as well as the cable/connectors then sure, you could use anything you wanted.

I would agree. It wouldn't surprise me if they are also quieter (electrically) than a battery supply, assuming good implementation.

Just make sure you get 75 ohm BNCs as opposed to 50 ohm, which seem to be more common (used for oscilloscope leads, etc.). When looking at connectors over time, I have noticed that many of the boutique BNCs are actually 50 ohm, but moar gold plated. Furutech--probably 50 ohm Vampire--also appears to be 50 ohm Cardas--appears to be 75 ohm, though can't tell for sure Trompeter 50 and 75 ohm shown in thumbnails: 50 ohm on left, 75 ohm on right.

Happy Birthday Billy!

Happy Birthday!

DACses DACses everywhere!!! Happy Birthday!

Threads? Polls, yes, of course... threads, no.

That sucks, but I had heard it was in trouble ratings-wise. Doesn't help to leave it in that time slot, now with a couple of lame-ass shows prefacing it, unlike last year with Terminator leading off. I don't think I ever watched Firefly, but noticed someone posted a link to BestBuy having the series DVD set for ungodly cheap... might just buy it.

Also, Toslink has a transmitter/receiver which introduces noise/jitter as well, so an additional conversion from electrical spdif to optical and back Good coax implementations should use a good pulse transformer (Newava?) and be terminated correctly. Many (most?) aren't. Many pulse transformers in existing equipment may be there more to pass FCC Part15 testing than their performance as a pulse transformer. Looking at my Rotel 855 for example (yeah, old ), it uses a pulse transformer and then a 2 conductor ribbon cable to the spdif RCA. Nice. Even well done, the clock is embedded in the data bitstream (bad design). Most DACs anymore don't rely on extracting the clock, but people still hear differences in cables when they shouldn't.

other than an xlr will never achieve 110ohm spec. Also to the OP, BNC and coaxial aren't mutually exclusive. BNC connectors are designed to be used on coaxial cable, most of them on specific coaxial cables. Try to make your spdif cable at least 1.5m... longer won't hurt you here.

x4!!!!

Saw this somewhere and hadn't recalled ever seeing it before: Switchcraft EH35MMS Switchcraft Just what Justin needs to keep those pesky 6ga ipod docks from breaking jacks

It's a mini-TRS connector (3.5mm I think... I would check that before buying however). The barrels of many do not allow them to fit. Obviously a custom lock key on the stock cable, but from what I've read, regular mini's are tight enough without it (assuming they fit).

I've done that in the past

Has to be 5.08mm form factor... the PCBs were designed for the Phoenix blocks. I'll take a look, but I was doing a parameter search. It dawned on me on my drive home that I could use the Hirose for the pedja DAC that I need 6, 8 and 2 pos. for, and use the SPOX for the dynahi/dynafet. The 6 and particularly the 8 pin (single row) were what dropped most lines out.

I really don't like the screw terminal blocks much, so I was going to use PCB headers/wire mounted connectors for a couple of projects. I need something in 5.08mm (0.200") or close, and the only ones I have come up with so far are the Hirose HF5 series at Digikey (http://www.hirose.co.jp/cataloge_hp/e67600011.pdf, or the Molex SPOX series at Mouser View List I want something where it is foolproof to take apart and put back together. I need connectors of 2, 3, 4, 6 and 8 pins. Digikey has everything I need. Mouser has everything EXCEPT the 8 pin header (they carry the 8 pin connector... not sure why?). One other question: if I go with the SPOX, you have a choice of brass or phosphor bronze crimp terminals. I am leaning towards the phosphor bronze. Right choice? (started to post this at HF by mistake... removed it)