Schematic : neutrodyne or TRF
rosa...@hotmail.com
tube UX112 and other that I don't know number.In total 8 tubes.I think
that is a TRF receiver or neutrodyne
I need the electric schematic.I live in Argentina
Can you help me? How operate this receivers?
Thank you
Carlos
philo
Is it a commercially made set?
If so...use Google
at any rate, be it a commercially made unit of homebrew they'd be
similar...as TRF was the state of the art back then
The filaments usually ran from a 6 volt battery
and the B+ was typically 90 volts or so
Michael Black
> rosa...@hotmail.com wrote:
>> I have an old radio.I think before 1926.It use six tubes UX201, 0ne
>> tube UX112 and other that I don't know number.In total 8 tubes.I think
>> that is a TRF receiver or neutrodyne
>> I need the electric schematic.I live in Argentina
>> Can you help me? How operate this receivers?
>> Thank you
>> Carlos
>>
>
>
> Is it a commercially made set?
>
> If so...use Google
>
> at any rate, be it a commercially made unit of homebrew they'd be
> similar...as TRF was the state of the art back then
>
Not really.
Yes, TRFs were probably the common receiver.
But by 1922, the regen, the superheterodyne and the superregenerative
receivers had all been patented. They may or may not have been
in common use, but they were known.
Michael
Bill M
Could you possibly post a photo that we can refer to? 8-tube TRFs
certainly existed but it could be a superhet as well. I have an 8-tube
homebrew superhet here.
A photo would tell us immediately if its a TRF or superhet and that
would make the difference in which tubes were used.
-Bill
Phil Nelson
sent me earlier in email. See "Unknown radio from Argentina."
Phil
"Bill M" <radio...@geeeemail.com> wrote in message
John Byrns
"Phil Nelson" <http://antiqueradio.org/contact.htm> wrote:
> I uploaded to alt.binaries.pictures.radio a couple of photos that Carlos
> sent me earlier in email. See "Unknown radio from Argentina."
>
> "Bill M" <radio...@geeeemail.com> wrote in message
> > Could you possibly post a photo that we can refer to? 8-tube TRFs
> > certainly existed but it could be a superhet as well. I have an 8-tube
> > homebrew superhet here.
> >
> > A photo would tell us immediately if its a TRF or superhet and that would
> > make the difference in which tubes were used.
It looks like a superheterodyne to me. I only see 7 tubes in there
though, I assume one of the front end tubes is either hiding or missing?
--
Regards,
John Byrns
Surf my web pages at, http://fmamradios.com/
Bill M
>
> It looks like a superheterodyne to me. I only see 7 tubes in there
> though, I assume one of the front end tubes is either hiding or missing?
I agree. Superhet. I don't see the IF coils, maybe they are underneath
the assembly where the IF tuning caps are.
First 5 tubes are likely 01A, fifth one being the detector, then maybe a
12A and then a 71A for the output would be my guess.
-Bill
Phil Nelson
them). They show an empty socket not seen in the other shots.
Phil
philo
> On Thu, 10 Dec 2009, philo wrote:
>
>> rosa...@hotmail.com wrote:
>>> I have an old radio.I think before 1926.It use six tubes UX201, 0ne
>>> tube UX112 and other that I don't know number.In total 8 tubes.I think
>>> that is a TRF receiver or neutrodyne
>>> I need the electric schematic.I live in Argentina
>>> Can you help me? How operate this receivers?
>>> Thank you
>>> Carlos
>>>
>>
>>
>> Is it a commercially made set?
>>
>> If so...use Google
>>
>> at any rate, be it a commercially made unit of homebrew they'd be
>> similar...as TRF was the state of the art back then
>>
> Not really.
>
> Yes, TRFs were probably the common receiver.
>
> But by 1922, the regen, the superheterodyne and the superregenerative
> receivers had all been patented. They may or may not have been
> in common use, but they were known.
>
You are right...
I probably just should have said TRF's were the most common.
Only saw one once...but a guy here in town has a superhet from that
era...it's even got miniature tubes...It really blew my socks off when I
saw it.
Bill Noble
a Gilfillian neutrodyne - which, if memory serves me right, has 4 tubes. I
never did figure out if it was working or not - I never got any results, but
it could have been a problem in the radio, or a problem with the operator -
I set up A,B,C supplies, but had to guess at voltages (filament was easy, I
think it was 3 but now I don't remember) - I guessed 45 and 22 for the B and
C - the only measurable B current I got was when I actuated the meter to
measure the voltage.
"philo" <ph...@privacy.net> wrote in message
news:5NidnZqFkdmtsL_W...@ntd.net...
Bill M
> 8 tubes seems like a lot for an early radio
Not really. Scott's "World Record" TRF radios were 8-9-10, etc tubes as
were most of the superhets of the mid-20s. Not your everyday radio,
mind you, but not uncommon.