S-Man
Kinkless Tetrode Admirer
Hi Alan,
I don't think that will help. Q6 is providing bias voltage for the drivers and the o/p devices (and the drops across the 0.22Rs).
Like most people I have Q6 embedded in the T section alu. This means that Q6 is only (directly) correcting for the o/p devices, it cannot correct for the driver temperatures. This means that the hotter the drivers get, the more that Iq increases. In my stacked arrangement, airflow for the lower board driver heatsinks is impeded by the upper board.
It runs perfectly fine with no lid. I've had it playing for the last hour and everything is below ~40C.
She is just going to have to stay topless, unless she gets a complete new outfit!
I could fix it by:
- Mounting the drivers on the T section (there are already some holes which look like they could be for this purpose)
- Some sort of diode arrangement which includes sensing the driver tr temp (see http://leachlegacy.ece.gatech.edu/lowtim/2ndstage.html)
- Redirecting some air to the driver heatsinks on the lower deck
- Full reboxing and ditch the stacked arrangement (although I prefer compact amps).
I don't think that will help. Q6 is providing bias voltage for the drivers and the o/p devices (and the drops across the 0.22Rs).
Like most people I have Q6 embedded in the T section alu. This means that Q6 is only (directly) correcting for the o/p devices, it cannot correct for the driver temperatures. This means that the hotter the drivers get, the more that Iq increases. In my stacked arrangement, airflow for the lower board driver heatsinks is impeded by the upper board.
It runs perfectly fine with no lid. I've had it playing for the last hour and everything is below ~40C.
She is just going to have to stay topless, unless she gets a complete new outfit!
I could fix it by:
- Mounting the drivers on the T section (there are already some holes which look like they could be for this purpose)
- Some sort of diode arrangement which includes sensing the driver tr temp (see http://leachlegacy.ece.gatech.edu/lowtim/2ndstage.html)
- Redirecting some air to the driver heatsinks on the lower deck
- Full reboxing and ditch the stacked arrangement (although I prefer compact amps).