Valve/tube car radio AM to FM conversion ideas?

[Albert]

Thanks for the replies. On second look I noticed that I put the
resolution
to 1280 x 960, which is not supported by the Gateway. What I saw was
the
whole screen, about 1 minute after changing resolution, disappeared
forming
a diamond shape, then a single vertical line and now it is totally
dead.

I see nothing or hear nothing when I turn it on now. All I see is a
blinking
amber light showing that it is getting power. I also see no fuses or
anything
accessible that a non-qualified technician could replace so I assume
it
it ready for the grave yard. Was very surprised that even switching
to
an unsupported frequency could of caused something like this, even
though it
apparently worked for a minute or so????

Thanks to all who sent information.

 

[Art]

"Chuck" <ch@deja.net> wrote in message
news:qiuc54d4h9sfprv4gftsq4dplu00bcp1nl@4ax.com...

On Thu, 12 Jun 2008 20:02:59 -0700 (PDT), "Tim R."
tim87529@gmail.com> wrote:

I have an old Zenith A1920W TV from 1984 that works great except for
one small problem.

When I first turn it on, I will get nothing but static on all
channels, and then it will suddenly clear up and work fine. It will
alternate between working and static for a little while and eventually
work normally. After that I can watch for hours with no issues.

Is it an overheating component? Or something expanding/contracting and
making intermittent contact? If anyone can point me in the right
direction I'd appreciate it.


Tim


The tuner in this set usually will have broken solder connections,
particularly at the sockets where the wire bundles run back to the
main board.. The shield on the tuner will need to be removed. I
think it needs to be desoldered, resolder all socket pins, touch up
poor ground connections and it should work ok. Chuck
Could be anything from the tuner through to the video processing, however

having snow indicates that most of the circuitry is operational excepting
the tuner. Suspect voltage sources to the tuner also, dried up electrolytic
can cause a very slow rise, and poor regulations in power supply voltages.
Suggest ESR the caps in the power supply and any circuits directly related
to the supplies for the tuner.

 

[Blarp]

On Mon, 16 Jun 2008 15:06:50 +0100, "N_Cook" <diverse@tcp.co.uk>
wrote:

must do the same sometime.
I've always picked up the standard earpiece and a pair of croc-leads and a
needle point rather than making a purpose built tool. Adding in a HV cap if
monitoring for noisy HT lines.
A scope would not show any more info in that situation and avoids
possibility of connecting scope up, in DC mode, set on 1mV/cm or HT pulse
transmitted through internal cap of scope, on a low range, and out goes dual
gate FET or whatever.

At home I have an old analog scope with "Y" output, onto which I
connected a simple amp+speaker.

The ticks / hums / squieks out of the speaker are extremely revealing
about what is measured; most of the time I do not need to look at the
screen at all.

In a cpu setup, one can even hear the software "run" on an adress
line (reoccurring sound patterns), and actually hear subroutines and
such.

At the office, the sophisticated DSO's no longer have this very useful
option..

--
- René

 

[Ross Herbert]

On Mon, 9 Jun 2008 16:18:48 +0100, "N_Cook" <diverse@tcp.co.uk> wrote:

r are they? how do you tell ?
:Raised pips spot-welded? on otherwise silver plated rockers in switch rated
:15 amp , 250V.
:If platinum, are they wholly platinum or somehow coated on a more base metal
:for the main body of the pip.


Going back into the dim dark recesses of my memory (with a little refreshing
thrown in) I recall the use of platinum relay contacts was usually only
specified where high reliability and/or currents and the presence of arcing was
expected. It is rare to find pure platinum contacts and they usually have some
added element to harden them and make them more resistant to tarnishing, arc
formation and wear. Materials such as iridium, ruthenium, nickel, molybdenum or
osmium are used.

How do you tell whether they are platinum contacts or not? I don't know. It may
depend on the manufacturer and you have to take their word for it. On 3000 type
relays used in telephony platinum contacts were marked with a V notch at the end
of the spring.

 

[Stephany Alexander]

On Jun 26, 3:34 pm, Don Bowey <dbo...@comcast.net> wrote:

On 6/26/08 2:57 PM, in article
7e29717c-809e-49a9-ad3f-37cfc3cae...@k30g2000hse.googlegroups.com, "Stephany





Alexander" <sermodera...@hotpop.com> wrote:
On Jun 26, 5:29 am, b <reverend_rog...@yahoo.com> wrote:
On 26 jun, 11:27, "Mark D. Zacharias" <mzachar...@nonsense.net> wrote:

On an older Sony stereo?  Dream on...

Mark Z.

Methinks stephany is a troll Mark,  just look at the ridiculous
answers to other recent posts!
-B

Methinks you better shut the fuck up before you call a moderator of a
newsgroup a 'troll'.

Nobody is impressed with your grandstanding anyway and it's you that
will suffer in the end when I deny you access to post on this
newsgroup.

Definitely a troll.- Hide quoted text -

- Show quoted text -

Definitely a fag.

Couldn't disagree with "B" now could we?

What's "B" doing now? Sucking your dick? Sticking his in your asshole?
Maybe he likes to take a shit in your mouth?

 

[Michael A. Terrell]

David Lesher wrote:

"Michael A. Terrell" <mike.terrell@earthlink.net> writes:

I will be updating this as it plays out. I expect the outcome to be
satisfactory, but the route it's taking is like one of those nightmares
where you're trapped on a 15 dimensional mobius strip.

Just be happy that you aren't trapped in a Klein bottle!

From <http://kleinbottle.com> perhaps?

Cute! ;-)


--
http://improve-usenet.org/index.html

If you have broadband, your ISP may have a NNTP news server included in
your account: http://www.usenettools.net/ISP.htm

Sporadic E is the Earth's aluminum foil beanie for the 'global warming'
sheep.

 

On Jun 8, 5:05 am, Brasto <bram.st...@gmail.com> wrote:

I am now working an ONKYO TU-D1. It is a funny little machine with CD
and Casette player.
I understand that Audio is wireless transmitted via IR to active
speakers.
As the unit has FM/AM controls I am curious to learn how that is
handled by this unit as I could not locate any Tuner or Antenna input.
Am I missing another component?
What could be the function of the multipin connector marked CONTROL?

Have a nice day
Brasto

I've a service manual on that item and it's companion piece the RU-D1
Quartz Synthesized Tuner Amplifier.
You're right it's a cool looking unit. Never knew of it before today
when I found the manual.
Cheers,
AA