[ivanrocks321]

Today I was scared to death since the left side of my HF2 stopped working. Turns out after some testing with other sources/amps, I have narrowed it down to a problem with the dynalo. I am not a DIY guy, so I have absolutely no skill in this sort of matter on how to repair or finding the cause. If anyone can assist me please let me know. Here are a few pics of the amp. The amp also has a slight burnt smell to it, however I do not know if this is normal or where in the amp it is coming from.

 

[Pars]

Do you have a multimeter (DMM)? If so, with the volume control set to minimum and no phones connected, measure the R and L channel DC offset. To do this, set the meter fo DC volts, place the black lead on ground, and the red lead on L output and then R output and note the readings. You should be able too get at these on the Neutrik output jack (black wire = ground, I would assume red = R chan and green = L chan). These should be very close to 0V. If they are (and the meter is not auto-ranging), set the meter to DC mV and repeat the measurements.

Until you check this I would not plug your Grados or any other low impedance headphone into this amp.

 

[FallenAngel]

I've never seen a Dynalo board like that before; it's certainly not the djgardner board. Anyway, measure DC offset as Pars suggested and start looking for components that get hot or look burned. Post findings.

 

[penger]

Re-cased headamp gilmore lite?

 

[MisterX]

The Gilmore V2 was sold either as finished amps or kits back before all of the ruckus about group buys happened.

 

[Pars]

Those aren't Gilmore V2 boards (my home Dynalo is built on a V2 board). The V2 board has both channels and the original Gilmore PSU with the OPA548Ts on a single board. These PCBs are more like GS-1/GS-X boards, but aren't even exactly that (they are marked as Monoboard V2.0).

GS-1/GS-X board:
http://www.headamp.com/home_amps/gs1...module_med.jpg

Gilmore lite:
http://www.headamp.com/home_amps/lit..._board_med.jpg

 

[jinp6301]

IIRC from the original sale ad, this was built on an older version GLite board.

And ditto on the multimeter.

 

[justin w.]

Looks like a "Gilmore V1" that was built as a kit