It's been a while since I've been on this forum -- while cleaning out my garage I found 1 never user CTH Rev A PCB - if anyone wants it for the cost of the PCB and shipping from Ottawa, Canada let me know? Not sure if should put this in the buy/sell but wanted to pass it to the DIY community first.

Quote:   Quote:   To close this loop, I got my HE-500's yesterday.  I'm quite happy with the HE-500's on the CTH but think it is current starved.  The bass thumps and extends, don't get me wrong, and details in the mids and highs are wonderful, but bass can loose some slight...

Hi all, has anyone tried the he-500 with a Cambridge audio A500, using speaker taps? The amp is rated at 65 watts into 8 ohms. I'm buying a he-500,and looking to amp options, either a lyr, bottlehead s.e.x, or my speaker amp. Thoughts?

I search and searched and maybe I just missed it, but is there any information on how much power the CTH can put out?  I'm looking into using it for some HE-500s and I've read that people are doing this successfully.  I'm just curious if we have ballpark numbers.  The HE-500's supposedly need 2...

Sat down to post... But.... The hum sounded suspiciously like a ground loop hum or such.  The DAC is connected to my DIY PIMETA.  The PIMETA is a metal case, and the output jack (headphone), is grounded to the case, however the input jack is not.  At the time I thought, while, I only have 2...

Hi All,   I just finished a y1, B configuration.  I used the kit from Glass Jar Audio.  I passed all the checks, the computer recognizes it no problem and it plays music.  The problem is the sound has a significant hum, is hollow sounds lacking mids and bass, as well sounds underwater at...

Yup - I think I had a Tenergy battery in one of my mini3's.  I had to take off the blue plastic label and even use a file to thin the black plastic casing of the battery a little.  I'm pretty sure the mini3 website documents that many batteries are too big.  Go slow, don't force it, remove a bit...

Quote:   Thanks, the DAC is feeding a CTH amp and lots of bass, punch and detail.  To be honest, I put the Elna's in based on faith, that one line on your site saying 'Some people have expressed a preference for these caps over any other on the AlienDAC'.  I might have to build another...

+1 thanks for Cobalmute for the design and TomB for the kit.  I received the kit today and built the DAC during my kids nap (a long one thankfully).  For the PCM I used the wipe technique, created a few solder bridges and used wick to clean them up.  I used the Elna RFS Simmic II 47uf caps and...

Quote: Sorry, can't comment.  I made it for my brother and sent it away.  I just recall it was afun sounding amp, made you want to bob your head.  Sound was greatly affected by the tube.  The part count is so low, it's not too much of a build as a trial.

I needed one replacement driver for my AKG K81DJ headphones.  I got in touch with AKG but the headphones are their consumer grades and they absolutely refused to provide any spare parts.  They suggested I buy new headphones.  In the end I posted a wanted add here on head-fi and a fellow...

I made this amp and it sounds pretty good.  Tube sound, lots of thump, and be made quite cheaply.   One thing is that you need to carefully consider the power supply here, noisy supplies were had a lot of hiss, quieter ones were way better.  ...

The holes affect the bass as one poster said, they must allow a certain amount of air to vent to the driver.  All holes open = muddy / more bass.  All holes closed = not as much bass.  I played around with it and found that   a) they are turned pretty well (and best to my ears) from the...

I used one for a CTH rev A.  I find it to be pretty good, I just found a knob (also on ebay) with a hole for a 1/4" shaft, it worked no problems.  It sounds great to me, a lot of clarity and was certainly much much better than a generic pot I was using until the ebay one arrived.   ...

Interesting, no I'm told the drivers I bought were not modified. 

I fried one of my AKG K81DJ drivers.  A fellow head-fi'er here gave me a great price on a K518 driver.  Aside from a post I found somewhere reportedly from an AKG rep which said the drivers are identical, I could not find other confirmation.    I took a photo of the two.  From the drivers I...

Quote:   Crackling can be a loose connection.  So, just a guess, but if it crackled and made noise when the cable was moved the solder joints may not have been up to snuff.  When you say after a while it just stop working maybe the wire came loose at the solderered connection and shorted...

Quote: I have noticed that when using 600 ohm DT880's my CTH e12 trips anywhere from 12 to 2, depending on music.  Luckily for me, the volume is more than sufficient.  Typical bass heavy music with big hits actually trips the e12 less than a song with a full and constant spectrum of mids...

Quote:   I think the diyaudio webpage for it says $50 if you go barebones, not including PS.  I'm sure spent more.  The parts list is quite simple.  You need to feed it a clean ripple free 12.6 volts, so if you read the diyaudio forum you'll see some people had to try many different 13V...

Quote: Hmmm, I don't like making too many comparsions.  Both amps are great.  The NP-100v12 can't drive 600 ohm Beyers well, but it does really great with my ER-6 and RE-0.  The CTH drives my Beyers but I prefer the NP-100v12 for my IEMs.  I think perhaps because the NP is bass heavy with...

My brother asked for a conversation piece. I settled on Roger Gomez's NP-100v12 because a) I wanted a tube amp, b) I seemed like a good project to learn to etch PCBs, c) why not learn to plastic solvent weld at the same time. Here is what I settled on. I'm pretty happy with it. The amp was very...

Update to DT880/600 ohm and e12 latching / unlatching:  I put in a 12BH7A tube (the tube I happened to buy was described as a RCA Black Plate).  The occurance of unlatching at high volumes has significantly reduced.  Aside, the sound is incredible and I can't stop listening to it.

  No other symptoms.  When the amp is warmer, it seems to affect the latching less.  It still occurs occasionally but I think last night I decided I could live with it.  I'm using non bom caps.  Unfortunately ebay links die quickly, but the dact I used was $10 from Hong Kong, 21 step gold...

Quote: A little late but, I have one QP3 but no L1H.  PM you address if you want, I can mail it out tomorrow.

Has anyone tried the knock off 50K log DACTs from ebay?  I have one while waiting for a 50K Alps pot.  My experience so far is that they sound fine, the attenuation curve seems pretty reasonable, channels seemed to be matched well, and build quality is so/so  (for $10 it's just fine).  What I am...