As a senior retiree I am 'Elmering' a 15 year old enthusiast (who as a
young newcomer to the hobby much to be encouraged, one would think).
He has a keen interest in things 'tube'. He is also working towards
his ham licence and is enthusiastic and becoming somewhat capable
about electronics in a variety of areas. He's collected several
interesting radios including a Trans-Oceanic that somebody was
dumping!

Unfortuantely somebody 'sold' his parents (the youngsters Christmas
gift) at an excessive price a B and K Dynaquik 500, tube tester which
is not only somewhat used and very mouldy but also doesn't work!

When discovered not working the seller would not even make an partial
or full exchange for an A****er Kent the young man also had his eye
on.

Am therefore looking for somewhere to free-download a schematic. Have
tried BAMA and the mirror site, also Nostalgiaair. Unfortunately the
available schematics for other models (e.g. the 606) which I have
downloaded, are not same circuit.

Some Model 500 manuals are available; but at a cost of up to $38 US
plus mailing it's rather expensive concerning an already overpriced
unit that may have a major problem such as dud meter!

Any suggestions or other help would be warmly appreciated by both of
us.

If there is a more appropriate forum for posting this request I
apologise here for being 'Off Topic' and would appreciate direction.

terryS wrote:

Unfortuantely somebody 'sold' his parents (the youngsters Christmas
gift) at an excessive price a B and K Dynaquik 500, tube tester which
is not only somewhat used and very mouldy but also doesn't work!

When discovered not working the seller would not even make an partial
or full exchange for an A****er Kent the young man also had his eye
on.

Am therefore looking for somewhere to free-download a schematic. Have
tried BAMA and the mirror site, also Nostalgiaair. Unfortunately the
available schematics for other models (e.g. the 606) which I have
downloaded, are not same circuit.

Have you done any googling? There are a number of sites that are dedicated
to tube testers.

Some Model 500 manuals are available; but at a cost of up to $38 US
plus mailing it's rather expensive concerning an already overpriced
unit that may have a major problem such as dud meter!

The meter is really easy to check, set your ohmmeter to a high range,
and connect it to the meter's terminals. The B&K's meter should deflect
on one of the ohmmeter's ranges.


Any suggestions or other help would be warmly appreciated by both of
us.

If there is a more appropriate forum for posting this request I
apologise here for being 'Off Topic' and would appreciate direction.

This is a perfectly good forum to ask questions such as these.

-Chuck

terryS wrote:

Unfortuantely somebody 'sold' his parents (the youngsters Christmas
gift) at an excessive price a B and K Dynaquik 500, tube tester which
is not only somewhat used and very mouldy but also doesn't work!

What doesn't it do?

Hit the case with Lysol and get the mold off. Then apply power, and
tell me what happens. Can you center the meter? If you put a tube
in, does the filament light up? Is the series light bulb good or has
it gone open?

All transconductance testers are basically a power supply, some series
and shunt resistors, and a meter. Plus a lot of switching. If nothing
works, it's in the power supply.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

On Feb 7, 3:11 pm, (Scott Dorsey) wrote:
terryS wrote:

Unfortuantely somebody 'sold' his parents (the youngsters Christmas
gift) at an excessive price a B and K Dynaquik 500, tube tester which
is not only somewhat used and very mouldy but also doesn't work!

What doesn't it do?

Hit the case with Lysol and get the mold off. Then apply power, and
tell me what happens. Can you center the meter? If you put a tube
in, does the filament light up? Is the series light bulb good or has
it gone open?

All transconductance testers are basically a power supply, some series
and shunt resistors, and a meter. Plus a lot of switching. If nothing
works, it's in the power supply.
--scott
..
Thanks Scott and other replies: About to work on it today. Have just
used Javex/Javel/Lysol etc on the inside of the case etc. and what a
strange odour/smell emanated!
Anyway the box and a couple of bits are now drying. The bottom layer
of charts seem glued/pasted into the lid; so who knows what's living
in there?
We have to do some snowblowing outside then trouble shoot the B&K.
Will advise. terryS