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AUDIO AMPLIFIER: PHILIPS HF306 STEREO CONTROL
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on Picture to Enlarge
The HF306 is a stereo control pre-amplifier, at first build in 1962,
who needs an end amplifier to function. It's
an construction box, which you had
to build yourself with inclosed manual. I
bought it in 1965 to use
it, together with an HF303, for
guitarplaying. Lateron I've bought an
HF309 and construct a bass-
reflexbox with an 9710 AM speaker. It was satisfied
for playing the rhythm guitar in small dancings.
After that I've sold the HF309 with
bass reflexbox and the HF306 was
used for mono and
stereo
switching for taperecorders. The next guitar
amplifier became an 100 Watts Eko amplifier,
which looks
like a Fender amplifier.
There are 4 inputswitches to make a choise for radio tuner, taperecorder
and turntable with crystal- or mag-
neto-dynamic pickup, whereby correction is nearby R.I.A.A
characteristics. There are 4 different high- or
low tone-settings. Also an output
for alternate current available for the
End amplifiers. Modern, nor-
malized contact jacks (I.E.C) for turntables and
tuner; round jack (D.I.N) for taperecorders in- and output.
The amplifier has his own powersource. Hum potmeters for both
channels each. The athode tracer for the
e nd amplifiers is not critical with 200 ohm.
An output switch with 4 possibilities has
build in for several
mono- and stereo choises. Balance pot is partly with
resistance material, partly with silver, through that not
needed weakening.
| SPECIFICATIONS ARE FOR BOTH CHANNELS !! |
| * Frequency | HF306
: 10 - 80000 Hz within 1 dB
HF306 + HF303: 10 - 45000 Hz within 1 dB HF306 + HF304: 10 - 25000 Hz within 1 dB |
| Tubes | 2
x EF 86 - Pre / Amp
ECC 82 - Tone ECC 81 - Cathode Tracer 7121 Indication Lamp |
| Power Cell | SR250B75 |
| * Output Level | 0,55 Volts (550 mV) |
| * Distortion | Total
distortion by 0,55 Volt Output and
1000 Hz: 0,17% |
| * Sensitivity | Taperecorder
(I) .................. : 450 mV
Radio Tuner (II) ................... : 150mV Crystal Pickup (III) ............... : 65 mV Magneto-Dynamic Pickup (IV): 8,5 mV |
| Distortion Noise Level | -40 dB with 0,55 Volts Output |
| * Input Impedance | Taperecorder
(I) ................... : 3,2 M Ohm
Radio Tuner (II) .................... : 2,2 M Ohm Crystal Pickup (III) ............... : 1 M Ohm Magneto-Dynamic Pickup (IV): 68 K Ohm |
| * Output Impedance | 200 Ohm |
| *Cathode Tracer Output | ca. 200 Ohm (Not Critical) |
| * Tone 20 Hz Maximum Power for | 1000
Hz + 14 dB
1000 Hz - 19 dB |
| * Tone 20000 Hz Maximum Power for | 1000
Hz + 14 dB
1000 Hz - 15 dB |
| * Correction Magneto-Dynamics Input | R.I.A.A Characteristics |
| Fuse | 100
mA delay by 220 Volts
200 mA delay by 127 Volts |
| Alternating Current | 220 or 127 Volts - 50 Hz |
| Power Consumption | ca. 17 Watts |
| Dimensions | 280(W) x 105(H) x 240(D) mm |
| Status | Working |
| Service
Manual
User Manual |
Yes
Yes |
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