Hi Steve,

I learned the hard way once, when I cracked the 500kHz gating pin on the
PBT/Reference board when trying to force the DR-7 board back in. I had a
blank display...........I was able to isolate the problem by connecting an
external 500kHz source from a function generator and restoring normal
function.
On another note..........I have used those replacement displays that the
fellow in Germany makes. They work very well. It is pretty much impossible
nowaday to get ahold of those old National Semiconductor dual LED displays.

Pete

"dxAce" wrote in message
...


Pete KE9OA wrote:

I've had mine apart when I was updating it. If you remove the
bandswitch/preselector range knob, the two black plastic side panels, and
the two screws on each side of the front panel that hold it to the
chassis,
you can tilt the front panel enough to get at that light bulb.
If you use this same technique, it becomes much easier if you ever have
to
pull out that DR-7 board. I used to always bend and tilt that DR-7 board
until I figured out this "lazy" way.

I'll make a note of that method, Pete. Sounds like that would make it a
bit
easier.

dxAce
Michigan
USA



Pete

"dxAce" wrote in message
...


jberenyi wrote:

Does anyone know how to change the bulb behind the main tuning knob?
I've never done it and it needs replacement. Thanks in advance.

Oh boy! I haven't done that in a long time, but I almost think you have
to
pull
the DR7 board to get to it. Easy enough I suppose but if you've never
done
it
before then you might have a bit of hesitation yanking that board.

If I get a chance and no one else responds I'll pull the cover on my R7
and take
a look see.