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standard sr-h505 transistor radio

standard sr-h505 transistor radio

So, today I’ll show you
Transistor radio from the 60s. This radio comes from Japan and has
the name “Standard SR-H505”. This Device is built several variants
Service. The variant here has two short
wave ranges and a medium wave Area. You can see the scale here, man
see some of the controls here, namely the station tuning, the
Volume and the sound panel. Here at the Side is the switch between
Medium wave, short wave 1 and short wave 2. The scale is divided into two parts, the lower area and the upper area
gives the frequency information, at short wave here is the left part of the shortwave 1
and the shortwave 2 on the right side. This radio has the name
Standard, so the manufacturer is (the company) “Standard” and it will be here in front
pointed out that there is a 3 band All-wave receiver is, up here can
one still the telescopic antenna pull out,
which is then for the two shortwave areas thought. Another bite to the side:
Here is the on-off switch and here are two sockets –
I’ll come back to that – I’ll turn it over again, that’s it
then here the back, because you can here know again: This is just the two
There are connections for headphones, you can So turn on two headphones,
At the time, that is what few radios have had. … and it goes to the opening … and the lid is removed.
Here you can see the inside again Summary of the technical data … and here is the look into it
Radio inside. I’ll raise it that way, then you can do that
recognize better and go now the individual functions of the radio:
Down here are the three batteries in, these are the mono-cells,
Let’s take out the protective cover here and you can see one right at the beginning
another special feature of this radio: It has two speakers, the
are only partially visible here, the one Speakers slightly larger, the other something
smaller, so the right is the Bass speaker and the left is the
Tweeters, whereby the transmission areas merge.
The next special feature on the radio is the variable capacitor here too
see is. This rotary capacitor is not like most of the time
Transistor radios usually a “squeezer” – Capacitor – so with a fixed
Dielectric – but has one here Structure, that is with air insulation
works, so is an “air-Drehko”. I turn now a bit here. you
can see how the rotary capacitor comes out or comes in, as the case may be
how I set the frequency now. An old TV Technician Note: One
opened device is always used that turned the “Drehko” if possible
is, you can not by mistake the sensitive label sheets of the
Rotate the rotary capacitor. Yes, then it goes on:
We have already seen the vote then here was the volume control the
is about these two Potentiometers (variable
Resistors), they are the axes in one another
but in each case the other potentiometers and that is the sound aperture here
and up here the long staff is for the Reception antenna, so replaces the
Reception antenna which one with earlier a long wire designed on it
are two windings, which then just the Receive signals from the bar
take and lead into the device. Here on the right you can see the telescopic antenna, the
mainly for the short Wave ranges is thought, you can
take off very far. I’m leaving you here in the case now
in there. This area here on the lower left
that’s the band switching, you see here are two small trimmers with those
one the adjustment of the equipment for the corresponding wave ranges then
can make. This long free area .. comes the
Battery in – I already mentioned – the three mono cells and here is the
Board of the device. We’ll go there Score something like this: Falling straight out
here these two transformers on, in the low frequency part
the signals once from the preamplifier adjust to the power amp and then turn
from the power amp to the adaptation Make loudspeakers.
Lots of components are here too recognize.
This device has eight transistors. That was actually standard in the
better equipment in these years 1961 and here are once these little ones rectangular boxes, these are filter
Boxes in which resonant circuit coils are – once here
once there and once there, for the interim Frequency amplification are used.
Here are even more coils the in the high-frequency part the frequency range
set for the medium wave and the both shortwave areas. Here, for example, is one
Transistor to see here is a pair of transistors too
see, that should be the final stage here, built in push-pull design
is and here you can still find electrolyte Capacitors and some in between
Resistors and other capacitors. Here on the right – hope you can see –
yes – on the right side are the two Headphone connections and then here
again the on-off switch of the Device. Maybe a hint to the
Frequency ranges – so mid wave is of course, that’s roughly 520
Kilohertz up to 1600 kilohertz. This device here has the shortwave
Variants of six to twelve megahertz and from twelve to eighteen megahertz, it
Then there was the variant that had the Range of 3 to 8 megahertz and 8
to 22 megahertz, otherwise they were Devices identical. I would now completely
like to introduce the device in terms of Reception, but it is bright day and now
I can not do any in Berlin on a clear day Broadcasters more on medium wave
receive. Even on shortwave it is a bit critical
because I live in reinforced concrete, where the in metal parts of the building the reception
affect something. I should go to the balcony now,
It would work there, but that’s for me cold.
That’s it. I hope it was interesting also here an old radio of the inner life
to see. I had this model as a very young
Human in my youth and have with it heard a lot, although there is no VHF area
had, that was here in Germany a bit unusual, we
have been to FM in those years too used to, but it has a lot of fun
made on medium wave and shortwave to hear distant stations.
That’s it.

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