Best regards

Marc

Great Britain's power standard was actually 120V/60 Hz until after WW2, when the national power grid conversion was made to 230V/50 Hz.

The USA and other North American nations didn't convert for reasons similar to those given for never converting to the metric system: too many appliances/tools out there that were in use. Apparently the Great Depression-and-two-war-devastated Euro countries had much less of a "problem" with their citizens accumulating expensive electrical gadgetry than did the relatively unscathed USA.

The thing that made me think that it was a Euro set was the tube that is marked "MARCONI" on the bulb, even though it is marked RCA RADIOTRON on the base. Not very meaningful, I suppose, since the set probably went through at least a couple of tubes in its useful lifetime.

Best regards,
Marc

:120 V operation doesn't identify it as "American". Most of Europe used 120V as its standard voltage prior to the start of the 1950s, although many countries used 50 Hz instead of 60 Hz as the frequency standard. The world (except for North America) changed over to 230V/50 Hz immediately after the conclusion of the second world war. Your item appears to be from the 1930s (closer to the start of the decade than the end) so it was probably made to operate on the then-standard of 120V. After the conversion, it was by then either obsolete and relegated to a storeroom, or operated for a while on a downconverter transformer.
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:Great Britain's power standard was actually 120V/60 Hz until after WW2, when the national power grid conversion was made to 230V/50 Hz.
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:The USA and other North American nations didn't convert for reasons similar to those given for never converting to the metric system: too many appliances/tools out there that were in use. Apparently the Great Depression-and-two-war-devastated Euro countries had much less of a "problem" with their citizens accumulating expensive electrical gadgetry than did the relatively unscathed USA.
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:The thing that made me think that it was a Euro set was the tube that is marked "MARCONI" on the bulb, even though it is marked RCA RADIOTRON on the base. Not very meaningful, I suppose, since the set probably went through at least a couple of tubes in its useful lifetime.
:

I wish I spoke another language as well as you speak English.
Lewis
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Hoi Ed,

:It is now clear that this is an intercom telephone.
:I have removed of each part and thus a schedule.
:Indeed, the inverter jumps back to the booth listen.
:Wiring the inverter was not complete and I thought this was faulty.
:There have been many parts replaced.
I will send you a schedule what originally looked like.
:Probably tomorrow, I have my son needed.
He has to explain to me how this works.
:Best regards,
Marc.
Live the translation machine!

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: : : : : : : : : :Sir Marc . . . . . . : : :I also tend to want to go with Sir Bill Geeeee's mentioned, intercom aspect identification of the unit also. : : :The units skimpy tube lineup with their overall available low gain, tends to suggest this as being a REMOTE UNIT rather than THE MAIN unit. : : :Using its speaker as a microphone tends to require a bit of amplification gain, even when utilizing the reversed output transformer boost. : : :Wonder if those two large black, vertically stacked components just behind the speaker are being two power resistors (for filament dropping) ? : : :Also confirm that the left shaft coming out, now WITHOUT its attached knob, is having a SPRING LOADED RETURN ACTION. : : :If so, there was initially being a bar knob on that function switches shaft end. Normally the knob rests horizontally and is in its normal intercom : : receive /listen mode, :you push down on the bar to TALK, then it pops back into its NORMAL intercom receive/listen mode, when being released. : : :Your photo sent is having a frontal profile somewhat akin to one of our antiquated Amerikanski sourced Executone units being shown below: : : : : : : : : : :I now see the the bar/lever knob is not so clear, so here is another units view that uses that type of knob, which is showing up 'mo better. : : : : : : : : : : :en . . . . . . :gratie : . . . . .mijn Nederlands .. : : : : :Sir Marc . . . . . . : : :Ik heb ook de neiging om te willen gaan met Sir Bill geeeee 's vermeld , intercom aspect identificatie van het apparaat ook . : : :De eenheden schraal buis lineup met hun totale beschikbare lage winst , heeft de neiging om dit te suggereren als een AFSTANDTOESTEL plaats van het hoofdtoestel. : : :Met behulp van de luidspreker als microfoon heeft de neiging om een beetje versterkingfactor vereisen , zelfs bij gebruik van de omgekeerde uitgangstransformator boost. : : :Vraag me af of die twee zwarte , verticaal gestapelde onderdelen net achter de luidspreker worden twee elektrische weerstanden ? : : :Ook bevestigen dat de linker as die uit zonder zijn bevestigd knop , is het hebben van een verende werking . : : :Zo ja, was er in eerste instantie dat het een bar knop op die functie schakelt aseinde . Normaal gesproken is de knop in horizontale stand steunt en is in zijn normale intercom ontvangen / luistermodus , :je naar beneden duwt op de bar totalk , dan springt terug in zijn normale intercom ontvangen / luister modus , wanneer zij worden vrijgelaten . : : :Uw foto verzonden is met een frontale profiel iets wat lijkt op een van onze verouderde Amerikanski bronnenstudie Executone eenheden hieronder weergegeven : : : : : : : : :Ik zie nu de de bar / hendel knop is niet zo duidelijk , dus hier is een andere eenheden mening dat deze soort knop , die is komen opdagen ' mo beter gebruikt . : : : : : : : : : :73's de Edd : : : :

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:::::Marc Van De Voorde
::::::Belgium
::::::
::::::Hi, thanks for the support. Try if it succeeds.
::::: If you see the picture, is the question.
::::::I find the brand and model of this unit.
::::: Is an old Gramophone cigarbox LF amplifier
:::::A:Originally there were 3 tubes in: 6C6-25A7 and probably a ballast tube can someone give more information?
::::: A schedule is welcome
:::::
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:::::Best regards
:::::
:::::Marc
:::::
::::Hi Marc,
:::: My vote is for intercom. One knob for talk/listen and the other for volume.
::::
::::Best Bill G,
::: Thanks for the input, as you say "an intercom" I have everything saved and a FM radio.
::: Will have a few images by sending.
::: Sorry for the bad English
::: Greetings, Marc
::
::I wish I spoke another language as well as you speak English.
::Lewis
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