I'm at the $150 price point for a DAC to drive a pair of Ety's on the road and a TMA-1 at my desk. The Bithead  appears to be the more rugged, the E7 is "shiny!" But which has the better sound?

Quote: Originally Posted by Edwood Uh, what else is going in the case? The Pimeta is not a big amp. -Ed The Alps blue pot forced me into the larger case.

Quote: Originally Posted by Edwood Don't forget to add lead weights in the case for your Pimeta. -Ed I've already moved from a Hammond J case to the larger K size, any more weight and I'll need to add wheels and a tow bar!

Quote: Originally Posted by guzzler Why? Unless you're using the same power supply for both the amp and the switching part, which seems like a waste, you can't use a transistor to switch. You also lose voltage across the transistor. A relay is a perfectly good connection, far better than...

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Quote: Originally Posted by Garbz yeah that is waaay to complicated. Use a D-type Flipflop with the switch triggering the input. On the output put a transistor, resistor and a relay and you're set. A relay seems so ..... inelegant ......

I'm looking at the following circuit to latch in the Bulgin momentary switch in a pimeta system: http://edn.com/contents/images/102804di.pdf This seems like a lot of components for such a simple task! (Four transistors, nine resistors, and a capacitor). Is there an alternative that...

As steinchen pointed out in the previous message, the force required to make the momentary vandal proof switch will push a small amp around. However, the force needed to toggle a toggle switch is considerable also. The Bulgin switch has a very flush profile, and can be mounted on the top of...

Quote: Originally Posted by tangent Yes. But for that price, I'd be looking at a Fluke instead, which will show "OL" when overloaded. Ouch! $235!! However your not just getting a meter, it also functions as an excellent weapon/club! (I'll keep looking for my old one, I must have...

Quote: Originally Posted by Garbz Ummmm... Are the ER-4Ps fine ? 5.5V is a lot of DC for a small cannelphone! Also mono I have to disagree. I personally believe that unless you have output protection circuit, plugin and unplug the headphones AFTER turn-on and BEFORE turnoff. The minor...

I use the 70% rubbing alcohol, but I blow the board dry immediately with canned air.

Quote: Originally Posted by nikongod so, i guess everything is going well? Everything is going well; now I just gotta correct the low battery power LED circuit problem, add an external power supply jack, change-out the temporary jacks, do the casework, find a battery drawer...

Quote: Originally Posted by fincherr Sound does come through the ety4's, it is very faint and scratchy. Your right, I've got a dc offset problem. I'm reading 5.5 VOLTS, (not millivolts), between the output ground and the output left and right. I'm also seeing 5.3 V offset from input...

Quote: Originally Posted by nikongod heres the real question, does sound (music, when hooked upto something) come through the etymotics? how big is your dc offset? Sound does come through the ety4's, it is very faint and scratchy. Your right, I've got a dc offset problem...

Quote: Originally Posted by halman Reichelt Batterihalter When the aluminium cover is slid into place it mounts firmly enough. the amp was completed over a year ago and i have had no reability problems with the battery compartment. Thanks! This looks perfect. I'll look for...

Quote: Originally Posted by Garbz The adapters are normally associated with poor sound not hiss static buz or whatever. R8 is there to raise the load seen by the amplifier. The idea is that since the etys present a very difficult load for an amplifier to drive stably being something...

Quote: Originally Posted by mono Did you put jumpers or resistors in the R8 (resistor) spots on the board? I suggest resistors if it's jumpered. Thoese are jumpered. I thought r8 was only to reduce hiss?

Well, the Bulgin BX0026 is not going to work very well with this enclosure, (the smallest Hammond that will take a Pimeta with an Alps pot). Has anyone used some type of hinged door to allow access to the batteries without having to unscrew the rear panel?

Quote: Originally Posted by Garbz Well the ER-4Ps are a very low impednace earphone. Background noises which are present will be much louder through these, however this would be described as white noise at low levels. The thump/click is due again to the low impedance which makes them...

Just finished wiring my first Pimenta, (with stacked buffers, AD8620/10 soldered to the bottom of the board, ALPS pot, class A bias, ZNR/FET, and all of the caps). Following Tangent's testing steps, I first plugged in a pair of cheap headphones, which sounded great at all volume levels. Then...

Obsolesce occurs long before cosmetic damage renders the unit unworthy, (and scratches show character!).

Quote: Originally Posted by Sultan165 Well, with all this talk about equalizers, what are some good ones to look for in the various price ranges (low, medium, high)? And does anyone make a portable equalizer? (or how would I build one?).

Quote: Originally Posted by n_maher Call me biased but this is my favorite MINT configuration. The case is big enough to allow the use of [2] 9v's without have to "halve" the MINT board. It's my current portable rig so I run the 9's in parallel to get more run time before I have...

Quote: Originally Posted by Emon What exactly are you having trouble with? For drilling the mounting holes you'll either want a stepped drill bit or a drill bit set and manually step up yourself. I'm not having trouble creating holes, it's the correct location that is eluding me!

Has anyone got a suggested panel layout drawing for Hammond 1455J and 1455K enclosures? I'm mounting a Pimeta with the board mounted Alps in the K, and an uncut Mint in the J. My first effort has produced a pretty ugly result, (however the case now has excellent ventilation properties!). I'm...