This makes more sense. I could not find a lamp with the specs
in the instruction book but this is a common lamp.
On 2/5/2020 9:59 PM, Steve Ruddy wrote:
Both of mine have the Osram 2.5 - 0.2 screw base with round lamp.
Steve
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On Wed, Feb 5, 2020 at 3:17 PM -0800, "`Richard Knoppow" <dickburk@xxxxxxxxxxxxx <mailto:dickburk@xxxxxxxxxxxxx>> wrote:
I have not investigated combinations of batteries. I don't
think the exact voltage is important. Anyway, I am in no rush. I
located the flash unit because someone asked about the capacitor.
On 2/5/2020 2:59 PM, John Wild wrote:
> Because of the cost of original type of flash batteries, I > have used A23 12v batteries.
>
> One is used for the 11.5v and two in series for the 22v > batteries. A bit DIY fiddling puts the contacts of the battery > in the correct place for the flash contacts.
>
> Both new battery compilations work fine and the bulbs fire well.
>
> The test lamp is just to check that the flash bulb will work > when required. It does nothing in firing the flash bulb, only > testing its ability to fire. It's brightness is important in > that if to high, it will drain the battery very quickly.
>
> Later flash bulbs had a blue dot to show the bulb would work > but originally bulbs did not have that dot so the test light > was important. The blue dot is not a total guarantee but it > does work most of the time.
>
> Oxidation of unused contacts will prevent reliable firing of > bulbs. I do not think the type of capacitor used is one which > will deteriorate in normal circumstances but I may be proved > wrong. I have found bulb ignition failure tends to be poor > contacts.
>
> John
>
>
> Get Outlook for Android >
-----------------------------------------------------------------
> *From:* rollei_list-bounce@xxxxxxxxxxxxx > on behalf of
`Richard > Knoppow > *Sent:* Wednesday, February 5, 2020
7:16:46 PM > *To:* rollei_list@xxxxxxxxxxxxx > *Subject:*
[rollei_list] Re: Rolleiflash > Thank you Carlos. The
lamp does slip under a spring clip. I > have to trace out
the circuit to see exactly where the lamp is. > The
specifications in both instruction books is for a lamp with
> somewhat unusual specs. Most 6.3 volt pilot lamps draw
more than > 60mA by two to four times. I have somewhere a
long list of most > types of miniature lamps. Have not
found it yet, its in an > engineering handbook. The flash
gun probably works fine without > the lamp. I may get this
thing working in the future, the main > problem is that the
battery is expensive. I have a lot of flash > bulbs, bought
them when I saw them, but who knows if they are > still
good. > Osram is a European brand, I think it was
associated with > General Electric. They also made radio
tubes and household and > auto lamps. > > On 2/5/2020 3:53
AM, CarlosMFreaza wrote: > > I think a miniature 6V and
0.2 amp lamp with the glass > > matching the flash unit
green window and the right size to be > > clamped on the
contact plate could work as test lamp.- > > Carlos > > > >
El mié., 5 feb. 2020 a las 7:40, CarlosMFreaza > > (>)
escribió: > > > > Richard: > > I
could read the info in the miniature lamp > > metal
rim: "Osram 0.2". This lamp has a thread but it is > >
not screwed to its basis, it is clamped only. > >
Carlos > > > > El mié., 5 feb. 2020 a las 6:56,
`Richard Knoppow > > (>) > > escribió: > > >
> I didn't think of looking at "Rollei Report".
Mine > > are the > > first editions. I
wanted to find the lamp type number. > > In both >
> the "Practical Accessories" booklet and in an >
> instruction book > > for the Rolleiflash
2 I found on Mike Butkus site it > > says the >
> lamp is 6 volts and 50 to 70 milliamps. Its a
T-10 > > miniature > > screw base and round
globe. I tried a tubular globe > > lamp, it >
> would work but doesn't fit well. The most common
pilot > > lamps in > > radio are the #44
and #47, they both draw considerably > > more >
> current than the lamp specified by Rollei. I will
look > > at the > > Rollei Report and see
what I can find. > > > > > > > > > > 3 > > >
> On 2/5/2020 1:21 AM, CarlosMFreaza wrote: >
> > Richard: > > > I checked
my Rolleiflash test lamp and > > I could >
> > read "Osram" in the upper metal rim in contact
with > > the glass, > > > there are other
signs I couldn't read with the loupe. > > The >
> > circuit scheme in the Rollei Technical Report
says 6V > > and 38 > > > for the test lamp
position. I don't know if this info > > is useful >
> > for your purposes. I could send you the lamp
image > > and/or to > > > check the lamp
again trying to read the signs if they > > mean >
> > something. The lamp is very small. > >
> Carlos > > > > > > El mar., 4 feb. 2020 a
las 18:27, `Richard Knoppow > > > (> > > > >>) >
> > escribió: > > > > > > The
battery seems to be a NEDA Type 215. They are > >
available > > > for about $20.00. I can't
identify the lamp. The > > closest > > >
seems > > > to be a type #40 but it draws
twice the current. > > I think it > > >
might > > > fire the bulbs when testing.
Perhaps someone knows > > > definitely the >
> > type number. > > > > > >
On 2/4/2020 8:30 AM, `Richard Knoppow wrote: > >
> > I found the specs for the lamp: 6V @ 60 mA. >
> A miniature > > > > screw base
indicator lamp. There is a European > > number >
> > listed in > > > > the little
booklet "The Practical Accessories". > > I will >
> > find a > > > > similar lamp at
Grainger or somewhere similar. > > > > > >
-- > > > Richard Knoppow > > >
dickburk@xxxxxxxxxxxxx > > > > > > > > > WB6KBL
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