"John Byrns" <byrnsj@[EMAIL PROTECTED]
> wrote in message
news:byrnsj-68097B.13303913052008@[EMAIL PROTECTED]
> In article <XgiWj.249$_03.86@[EMAIL PROTECTED]
>,
> "Iain Churches" <IainNG@[EMAIL PROTECTED]
> wrote:
>
>> "flipper" <flipper@[EMAIL PROTECTED]
> wrote in message
>> news:c2bj24hlc8fgl6msamgt38ns9fperk9sg9@[EMAIL PROTECTED]
>> > On Tue, 13 May 2008 16:56:53 +0300, "Iain Churches"
>> > <IainNG@[EMAIL PROTECTED]
> wrote:
>> >
>> >>
>> >>
>> >>"Patrick Turner" <info@[EMAIL PROTECTED]
> wrote in message
>> >>news:482997A0.E092E497@[EMAIL PROTECTED]
>> >>>I seem to have lost contact.
>> >>> Patrick Turner.
>> >>
>> >>I wondered if your 845 amps had gone up in
>> >>smoke, and taken you with them:-)
>> >>
>> > I wondered about everyone because the group seemed to be dern near
>> > dead silent for a while.
>>
>> We are all probably fettling away on tube projects:-)
>> I have a tube driven VU level indicator unit just complete
>> and ready for calibration. Pics available if anyone is
>> interested.
>
> "Tube driven VU level indicator unit", what is that? Why are tubes,
> transistors, or any active devices needed in a VU meter unit, the ones I
> have are designed to connect directly across a 600 Ohm audio line?
Hang a VU across the line and measure the increase in
distortion. You can "hear" the difference!
At least in the UK a buffer amp was commonly used.
>
> I would like to build a tube driven facsimile of a PPM, using a meter
> movement I salvaged from a scrapped transistorized AM modulation
> monitor. Any thoughts on a suitable circuit for a project like this?
Which type of PPM are you referring to John.
Does it have a scale to 12 with a red line at 8 ?
Regards
Iain
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