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From: piglet <erichpwagner@hotmail.com>
Newsgroups: sci.electronics.design,sci.electronics.repair
Subject: Re: Francophones
Date: Sun, 22 Dec 2024 23:01:06 -0000 (UTC)
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Liz Tuddenham <liz@poppyrecords.invalid.invalid> wrote:
> Cursitor Doom <cd@notformail.com> wrote:
> 
>> On 21 Dec 2024 22:30:23 GMT, Allodoxaphobia <trepidation@example.net>
>> wrote:
>> 
>>> On Sat, 21 Dec 2024 21:37:59 +0000, Cursitor Doom wrote:
>>>>> in series with your 50 Ohm source.
>>>> 
>>>> Yes, but you know what a *bitch* it is to find a purely resistive 10
>>>> ohms....
>>> 
>>> Maybe just a length of nichrome wire?
>> 
>> Still got parasitics. Avoiding them is a craft in itself.
> 
> I wouldn't worry about the inductance of an ordianry 1/4 -Watt resistor
> at the frequencies involved.  The only point where it might make any
> difference is the VHF input and oscillator tuning - and I can't think
> you need a great level of accuracy to align a domestic portable radio.
> 
> It is even possible that they specified a 60-ohm sig gen because they
> knew that most of the available ones would be near enough at either 50
> or 75 0hms.   Another possibility would be to try to make you think you
> had  to return the radio to their specialised service department for
> repair.   The avarage radio shop (if there are any left) simply wouldn't
> care and would use whatever they had on the shelf above the workbench.
> 
> 

60 ohms was a popular impedance for RF test gear in Europe in the 1950s and
60s

-- 
piglet