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 <https://aka.ms/ghei36>
-----------------------------------------------------------------
*From:* rollei_list-bounce@xxxxxxxxxxxxx <rollei_list-bounce@xxxxxxxxxxxxx> on behalf of `Richard Knoppow <dickburk@xxxxxxxxxxxxx>
*Sent:* Wednesday, February 5, 2020 7:16:46 PM
*To:* rollei_list@xxxxxxxxxxxxx <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
> (<cmfreaza@xxxxxxxxx <mailto:cmfreaza@xxxxxxxxx>>) 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
> (<dickburk@xxxxxxxxxxxxx <mailto:dickburk@xxxxxxxxxxxxx>>)
> 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
> > (<dickburk@xxxxxxxxxxxxx
> <mailto:dickburk@xxxxxxxxxxxxx>
> <mailto:dickburk@xxxxxxxxxxxxx
> <mailto:dickburk@xxxxxxxxxxxxx>>>)
> > 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
> <mailto:dickburk@xxxxxxxxxxxxx>
> <mailto:dickburk@xxxxxxxxxxxxx
> <mailto:dickburk@xxxxxxxxxxxxx>>
> > WB6KBL
> >
> > ---
> > Rollei List
> >
> > - Post to rollei_list@xxxxxxxxxxxxx
> <mailto:rollei_list@xxxxxxxxxxxxx>
> > <mailto:rollei_list@xxxxxxxxxxxxx
> <mailto:rollei_list@xxxxxxxxxxxxx>>
> >
> > - Subscribe at rollei_list-request@xxxxxxxxxxxxx
> <mailto:rollei_list-request@xxxxxxxxxxxxx>
> > <mailto:rollei_list-request@xxxxxxxxxxxxx
> <mailto:rollei_list-request@xxxxxxxxxxxxx>> with
> 'subscribe'
> > in the subject field OR by logging into
> www.freelists.org <//www.freelists.org> <//www.freelists.org>
> > <//www.freelists.org>
> >
> > - Unsubscribe at
> rollei_list-request@xxxxxxxxxxxxx
> <mailto:rollei_list-request@xxxxxxxxxxxxx>
> > <mailto:rollei_list-request@xxxxxxxxxxxxx
> <mailto:rollei_list-request@xxxxxxxxxxxxx>> with
> > 'unsubscribe' in the subject field OR by logging into
> > www.freelists.org <//www.freelists.org> <//www.freelists.org>
> <//www.freelists.org>
> >
> > - Online, searchable archives are available at
> > //www.freelists.org/archives/rollei_list
> >
>
> --
> Richard Knoppow
> dickburk@xxxxxxxxxxxxx <mailto:dickburk@xxxxxxxxxxxxx>
> WB6KBL
>
> ---
> Rollei List
>
> - Post to rollei_list@xxxxxxxxxxxxx
> <mailto:rollei_list@xxxxxxxxxxxxx>
>
> - Subscribe at rollei_list-request@xxxxxxxxxxxxx
> <mailto:rollei_list-request@xxxxxxxxxxxxx> with
> 'subscribe'
> in the subject field OR by logging into
> www.freelists.org <//www.freelists.org> <//www.freelists.org>
>
> - Unsubscribe at rollei_list-request@xxxxxxxxxxxxx
> <mailto:rollei_list-request@xxxxxxxxxxxxx> with
> 'unsubscribe' in the subject field OR by logging into
> www.freelists.org <//www.freelists.org> <//www.freelists.org>
>
> - Online, searchable archives are available at
> //www.freelists.org/archives/rollei_list
>
--
Richard Knoppow
dickburk@xxxxxxxxxxxxx
WB6KBL
---
Rollei List
- Post to rollei_list@xxxxxxxxxxxxx
- Subscribe at rollei_list-request@xxxxxxxxxxxxx with 'subscribe'
in the subject field OR by logging into www.freelists.org <//www.freelists.org>
- Unsubscribe at rollei_list-request@xxxxxxxxxxxxx with
'unsubscribe' in the subject field OR by logging into www.freelists.org <//www.freelists.org>
- Online, searchable archives are available at
//www.freelists.org/archives/rollei_list
