|
Closing the back lid, look the front
cover ergonomics and functions.
Knobs are simple kinda style, but
NOT interchangeable, so when you dismantling it beware to
write down which knob are used, 'cause if not, you have to
play a while to reassign right place!
As we have said before, BW haven't
any band switch. Two dial drums are used for tuning 0-30 Mhz
at 1 Mhz segments on the left and 0-1000 Khz segments (with
10 Khz separation) on the right. On the right too is present
a simple S-Meter vertical positioned. Under this is present
a little metallic knob that serves for "Zero Set"
tuning calibration. No dial light at all.
Tuning knobs (here shown the KHZ
one) action is smooth and precise, but still a bit short range
action - in the KHZ case-a problem that affect FRG-7 too...but
here is a little portable, not a stationery table model receiver.
However, is not so difficult tune KHZ knob to 5 Khz limit.
SSB Clarify action affects
AM tuning too, but is simple to locate it to center with "Zero
Set" calibration.
BW case is all made in rugged metal, so
BW is MUCH LESS prone to pick up interference from TV sets,PC
Clocks and so on, in comparison to more modern "All Plastic"
portable sets like Sangeans.
Unluckly,
BW seems to easily collect many FM local intermodulations
on vary frequencies. So, if you don't want to hear it (and
you don't care about originality),you'll sure need of a 30
Mhz Low-Pass filter.
|
The not-foldable whip antenna, typical for
a only-AM concepted receiver, is not so long (about 80 cm.)
but is almost for rx sensitiveness to pick up many and many
stations!
However, if you want to attach an external
antenna, you have a very simple jack on whip base (arrowed)
to connect to. On the opposite side of BW is present a similar
jack for earthing. To use it, use a common RCA-type male plug...
I have experimented some
with ext antennas and result was disappointed!
The little cap (5 pf) plugged between external
antenna jack and BW board was sure inserted to reduce to the
max intermodulation...but I have hear less signals come in with
a quite long external trapped antenna(18 mt.) than with on-board
whip!!!
On the other way, pluggin' a random LW
antenna directly to the whip (closed) produced in the SW range
hearing only a VERY STRONG
intermodulation. However, I've seen that performance havin'
a good increase if BW is well grounded...and with its whip
antenna. HEAR the shots!
On the left border of BW are present
two jacks, one for DC external input and lower for headphones
jacks. DC jack is "modern" japanese shape, with
an hollow pole in center and earth (plus pole in this case,
see that radio have germanium transistor with + pole earthing)
external connection. Headphone jack is a common 3,5 mm. diameter
connector.
However, BW don't receive a single
signal if you don't extend out SOME or ALL of the whip or
not provide it with whichever kinda of antenna!
In the pic, "Oregon" BW
with the King of portables Zenith Transoceanic (model H-500
shown here)
Click HERE
to continue
|
