livewire

I tested my latest batch of 2SC3675 Sanyo sand on the DY294. Results were: 11 pieces - hFE measured between 30 to 45 39 pieces - hFE measured between 50 to 68 (will be using these) V(BR) measured >1050 volts on all parts. That's a relief! I don't purport that these measurements are absolute, at least they jive with the datasheet. The el-cheapo DY294 tester gives me some piece of mind. @c12mech - sorry to hear you got ripped-off. I hope there is a positive outcome. I'm dealing with a similar situation with Dalbani. Long story, still waiting for a refund on T2 sand that was never shipped... Only $50, no biggy. Time for another phone call. <<sighs>>

Ha!

He has been using it at the other place for quite sometime. BB has a dog's head o'er there.

SMD vs THD ?

Thanks for the clarification Lil Knight and KG.

Thanks for the reply. Is this an extra coating on the pcb? Or maybe an applied kapton tape or other insulator? Please educate me.

True dat! Although we know that you got a stash!

Ok, I'll bite, Tho i'ma not building a dynahi. What is with the superimposed LT1021 and the LM4040 ? One on each side of the pcb? Also the "blacked-out" psu 'lytics. Are they placed on opposite sides of the pcb, or just use extra insulation over the solder-resist, or ? Please excuse the seriously stupid questions, just curious...

Current posted price at Quad is about $1800 for the Floats and another $1800 for the driver box. Connector looks similar to the five pin STAX Pro, although the pin spacing seems different. http://www.quadmusikwiedergabe.com/html/jecklin1.html

Happy Birthday Sir!

Wasn't hard to find when I bought them almost a year ago. Yes, they are all EOL, I sourced them through B&D. One of the transistors is no longer available at B&D, the only source is through a Chinese distributor on ebay. Didn't want to go that route with all the fakes being sold these days.

Thanks Al. Can't wait to hear it sing!

Glad to hear it is working good now! I believe it does self-bias the tubes, am not really sure - I have not built my T2 yet. There is a bias type adjustment for the 740 volt batteries, the pots are marked RV1 and RV2. Not something you want to mess with though.

Sorry to hear this Al. Maybe give Kerry a call? Before doing any heavy duty troubleshooting with a multimeter, I would check the following: 1) inspect all external connections (audio cables and umbilicals) for looseness, dirt, damage and bridging across pins. 2) Try a different source and signal cables. 3) open it up and check the pcb mounted screw type terminal block wire connections for looseness, especially for those wires coming off of the transformer. (I remember you posting that it did have shipping damage to the trafo in the past.) 4) while the covers are off do a visual inspection for anything that may look funky on the pcb boards. If you do open it up, make sure that all power is removed and that any high voltage capacitors are drained down first. 5) A ground loop or other external source of interference could be present. Try moving the setup to a different part of the house and plugging into a different receptacle. Do not stack the metal cases while testing. 6) When you said "both sets of tubes" does that mean you have eight of the EL34s? and eight of the input tubes as well? If you are only testing with the tube set that came with the amp, try switching the tubes front to back and back to front as well. 7) if none of the above helps, re-biasing the affected channel may do the trick. Sometimes the pots can get "noisy" with age and tweaking them to a slightly different position does the job.

The necromancy continues... After four months of searching in vain, I found my bag of lost BH sand. It was shoved into a shopping bag of Home Depot door parts that was bought around the same time. My daughter was cleaning the living room and rearranged all my stuff, and put it elsewhere. Got lucky for waiting and saved ~$170. (repurchase cost) Time to get this project back on track. Almost done stuffing the boards, will post pics in a day or two.

Thanks for the recommendation Dusty! I really like my MDR-V6 as is. Hard to believe that a $40 headphone can sound this good. (They were on sale at Amazon around Christmas time.)

Happy birthday Larry!

Happy Birthday Fitz!

Justin have you found a decent source for 2SA1486 sand? (other than B&D)

Happy Birthdiy!

My KGSSHV runs on the warm side, definitely not "hot" on the outside of the case. The case is a stock Par-Metal aluminum box, no extra venting needed.