Jim -
I believe my R-7 Service manual has the TDA2002 power supply in it.
I'll be home tomorrow and can look it up if you don't have it by then.
73, Garey - K4OAH
Rome, GA
Drake 2-B, 4B & 4C Line & TR-4/C Service Supplement CDs
www.k4oah.com
Jim Shorney wrote:
Hi group,
My "new" R7A, SN:29xx, has a different design power supply board than
is reflected in the R7 service manual PDF that I have. The one in the
PDF is similar to the TR7 manual that I have (from the Hammanuals CD),
less the fixed passband pots. This newer revision has the marking B
4935-A on the circuit board, and uses a TDA2002 in the DC-DC converter
section instead of transistors. There is also an LM317 in the circuit.
Does anyone have a schematic on this later version that they can
contrubute to the collective?
73
-Jim
NU0C
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