- Country
- Germany
- Manufacturer / Brand
- Grassmann, Peter, RFW, Radio-Funk-Werkstätten; vor 1945, Berlin & Neuhaldensleben
- Year
- 1937/1938
- Category
- Loudspeaker, headphone or earphone
- Radiomuseum.org ID
- 14869
- Number of Tubes
- 1
- Valves / Tubes
- RGN2004
- Power type and voltage
- AC/DC-set
- Loudspeaker
- Electro Magnetic Dynamic LS (moving-coil with field excitation coil)
- Material
- Metal case
- from Radiomuseum.org
- Model: Helios 20 - Grassmann, Peter, RFW, Radio-
- Notes
- Lautsprecher mit Erreger
- Price in first year of sale
- 200.00 RM
- External source of data
- E. Erb 3-907007-36-0
- Source of data
- Handbuch WDRG 1937 / Radiokatalog Band 2, Ernst Erb
- Circuit diagram reference
- Röhren in FS-Bestückungstabellen
- Other Models
-
Here you find 111 models, 76 with images and 30 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
All listed radios etc. from Grassmann, Peter, RFW, Radio-Funk-Werkstätten; vor 1945, Berlin & Neuhaldensleben
Forum contributions about this model: Grassmann, Peter,: Helios 20
Threads: 1 | Posts: 2
Dear Michael!
Please see mail, and:
http://www.radiomuseum.org/dsp_model_history.cfm?model_pk=109998
Oder parts, oder not parts??
http://www.radiomuseum.org/act_main.cfm
Similar: not correct ( Speaker not capacitor, not resistors....).
Regards:
STS
----- Original Message -----
From: <noreply[A*T]radiomuseum.org>
To: <stts[A*T]zalaszam.hu>
Sent: Tuesday, July 22, 2008 12:42 AM
Subject: Your model suggestion was rejected.
Dear Sandor Selyem-Tóth.
Your proposal of a new model:
Dynamic Speaker GPm 391 (GPm391)
for www.Radiomuseum.org has been
rejected
If you see any problem with this, please write to
mediator[A*T]radiomuseum.org He will help to clear the
situation. We would like to show a very good database but
also to have a good understanding.
Kind regards,
the Radiomuseum server.
Please see mail, and:
http://www.radiomuseum.org/dsp_model_history.cfm?model_pk=109998
Oder parts, oder not parts??
http://www.radiomuseum.org/act_main.cfm
Similar: not correct ( Speaker not capacitor, not resistors....).
Regards:
STS
----- Original Message -----
From: <noreply[A*T]radiomuseum.org>
To: <stts[A*T]zalaszam.hu>
Sent: Tuesday, July 22, 2008 12:42 AM
Subject: Your model suggestion was rejected.
Dear Sandor Selyem-Tóth.
Your proposal of a new model:
Dynamic Speaker GPm 391 (GPm391)
for www.Radiomuseum.org has been
rejected
If you see any problem with this, please write to
mediator[A*T]radiomuseum.org He will help to clear the
situation. We would like to show a very good database but
also to have a good understanding.
Kind regards,
the Radiomuseum server.
Sándor Selyem-Tóth, 22.Jul.08