The NFB-1 is currently in the testing phase and is based upon the RE5 circuit (in so far as the RE5 base circuit can be used) and packaged in the mid size ROC/RE5 chassis box. Looks like this DAC should be a real high quality contender in the sub 1.25K range. I'm guessing about the price range (...

I had a part go south on me last week which after testing a fair amount of the circuit I narrowed the fault down to a single 22uf 400V United Chemi Con electrolytic cap having self destructed.   Obviously the yellow arrow points to the failed part. My question is this......Can I go with a...

I have this old NAD preamp that has a pretty decent MM/MC RIAA phono preamp in it that I want to put back into service for the casual listening/computer head fi setup but it's in need of a few updates (PSU rebuild and recap, some wiring/jack upgrades, resistors, diodes, IC OPA's). The Preamp...

Is this player still considered a decent performer compared to it's newer stable mates ? Keep in mind I have no use for the video side of the unit so I'm solely focusing on 2 channel SACD/DVD-A performance. EDIT: No one has one of these players ? Not a single comment ? I'll simplify the...

Well I'm not going to write a massive hand hold dissertation with this upgrade because it's not that hard but has it's difficult moments just like any other mod I suppose. I'd put this DIY Upgrade projects difficulty level at a 3 out of 5. Annoying level at 3.5 of 5. Ok to start you need...

Just got this in the today from the DHL man......(along with a C-2C headphone amp, pics is Amp forum later) Sorry about the pic quality...... Peete.

Hi guys, Anyone know anything about this rectifier and whether or not it's worth a shot ? NOS CV378 Rectifier tube GZ37 / GV34 / 5U4G / 5AR4 USA - (eBay.ca item 300297157615 end time 07-Mar-09 01:26:31 EST) Peete.

Hi all, I had this venerable Nelson Pass designed passive/active preamp sitting around gathering dust for the last year or so (was in use for years previous in the main system) and wanted to upgrade it a number of times over the years and never got around to it until a month ago.......ran...

Hi fellow DIY junkies, My old tube amp went pfffffft...today ....so I hauled it's immense bulk upstairs turned her over and found a baked (grid ? ) resistor at one of the EL34 tube sockets. Here's a pic. Now the resistor in question is what 2W 10 ohm ? I'm guessing the rating. I'm...

Hi all, How hard is it to convert the coax out (Transport) and coax in (DAC) over to BNC connections ? Is it a simple matter of swapping the jacks out and buying the correct cables to use with the new method of connection between digital devices ? Somehow that seems to easy....so it must...

Hi fellow Head Fi DIY enthusiasts, Not knowing much of DVD players and understanding they are a different animal under the hood than your relatively straight forward CD player, what is the criteria for selecting a good base used "Universal" or SACD/DVD unit for DIY modifications ? The budget...

The long awaited (for one or two people) FrankenZERO project is complete and ready for prime time After long months of work, testing, listening, testing some more, listening....sigh....here it is......(it's not much to look at, but sure sounds good) All right let's get on with the heart...

This subject line has been a long time in coming. Hopefully the creation of which will alleviate the load on the reader having a thread with 700+ posts to wade through for the latest ruminations on tweaks, mods of all stripe etc.... Please post related ideas, tweaks, mods etc...in this...

AltoAcoustic Tube Amplifier Dock for IPod 12AX7 EL84 - (eBay.ca item 360089617117 end time 16-Oct-08 23:15:57 EDT) Check this out ....what a novel concept. Peete.

Hi Fellow DIY junkies, I bought this kit (PS1) from Welborne Labs, have stuffed and assembled the PCB but have run into a small snag with the instruction sheet and transformer supplied with the kit. The sheet gives one set of color codes with the transformer having another set,some match...

Hi Guys, The part in question is indeed the culprit. Did the red food coloring in the water tank trick...the result being the bowl water turned red. The flapper seems to be a one piece unit riveted to a 1.25 (or so, didn't measure exactly) in diameter fill tube. The seal is gone obviously...

Hi Fellow Head Fi members, What are the origins of the wrist watch and why ? I know the answer. I just thought it might be interesting to pose the question. The answer is somewhat surprising. Peete.

Any difference other than the obvious pricing difference ? The amp in question is made for 274B recs so no worries about upstream cap (less than 10uf) and has choke. Does Sophia contract TJ for their mesh plates ? They look identical, but my eyes are not that good going by the pics online...

Anyone have one of these and if so what's the best set up for it (dual crown chips etc) ? I'm intrigued by it's thorough build quality. Is it all window dressing or the real deal ? Is the kit an easy assembly as the website says ? Thanks for any insight !! Regards, Peete. PS Heres...

Here's the link, only 11 hours left so i hope you see this post before the auction ends. PAIR GEC CV4005 6X4 EZ90 UNUSED BOXED MADE IN ENGLAND - eBay (item 120253042959 end time May-02-08 07:16:16 PDT) Regards, Peete.

Is the Pac Valve mod worth the extra 60 bucks or would I be better served getting the regular AH and upgrading it myself ? What are the typical tweaks besides opamp upgrades for the AH that are worthwhile or even necessary to get the most from this little DAC ? What DAC under 350 US has...

Is anyone using a variac to step the mains V down from 120V to 110V for their amps spec'd for 110V ? The benefits are obvious ..... is there an audible SQ disadvantage to a variac ? What's the best current rating to purchase 5 or 10 amp ? What's the dif between a reg Variac and an isolated...

Hi fellow Head Fi'ers, I've been toying with the idea to replace my main sys preamp with either of the amps listed in the thread tittle. Has anyone used either as a full time preamp and if so can you pass on thoughts on each amps merits/drawbacks. Sure it's not a traditional use for the DV...

Hi all, Does anyone know off hand what type as the title says ? I have 6922's and 12AX7's on hand. Just thought I'd ask before cracking open the X-10. Thanks in advance, Peete.

One of the power tubes is marked 6H6N like I expect but the other is marked B82N. Is this a mistake ? The reason why I ask is hum in one channel has crept up ( It was dead quiet for the first 24 hrs of burn in ) to a level that is very noticeable. Obviously something is amiss... I'm in the...