I have been looking at some tubular components in a 1956 Olympic-Opta Bella 5700W, tube lineup =ECC85,EF89,EABC80,EL84,EM80. I have had these refered to as capacitors from two places, another site shows them as resistors, I think they are coils. One of the larger ones is marked "Rosenthols 300/2 500V" There is a symbol in the middle of the name that I see on other smaller units as well. The components are tubular ceramic with an air core, I can send pictures to anyone that can identify these. Other ones are marked "5nKf" and "30AF" "15AF". I also have a Grundig 4570U with some of these marked "30J" "39J". A schematic for the opta is not available. I could get a schematic for the Grundig, but I that still wouldn't prove what values are in the Opta. Any help is greatly appreciated.

It's very possible that these are ceramic capacitors. Check out the following site for European cap markings:

http://my.execpc.com/~endlr/markings.html

Good luck !

Rich

:I have been looking at some tubular components in a 1956 Olympic-Opta Bella 5700W, tube lineup =ECC85,EF89,EABC80,EL84,EM80. I have had these refered to as capacitors from two places, another site shows them as resistors, I think they are coils. One of the larger ones is marked "Rosenthols 300/2 500V" There is a symbol in the middle of the name that I see on other smaller units as well. The components are tubular ceramic with an air core, I can send pictures to anyone that can identify these. Other ones are marked "5nKf" and "30AF" "15AF". I also have a Grundig 4570U with some of these marked "30J" "39J". A schematic for the opta is not available. I could get a schematic for the Grundig, but I that still wouldn't prove what values are in the Opta. Any help is greatly appreciated.

:I have been looking at some tubular components in a 1956 Olympic-Opta Bella 5700W, tube lineup =ECC85,EF89,EABC80,EL84,EM80. I have had these refered to as capacitors from two places, another site shows them as resistors, I think they are coils. One of the larger ones is marked "Rosenthols 300/2 500V" There is a symbol in the middle of the name that I see on other smaller units as well. The components are tubular ceramic with an air core, I can send pictures to anyone that can identify these. Other ones are marked "5nKf" and "30AF" "15AF". I also have a Grundig 4570U with some of these marked "30J" "39J". A schematic for the opta is not available. I could get a schematic for the Grundig, but I that still wouldn't prove what values are in the Opta. Any help is greatly appreciated.

My experience with old parts is that you are looking at wire resistors encapsuled in ceramics.
Mostly for low resistance and high wattage.
I also will like to know from you where I can get the schematics for the Grundig 4570U

:My experience with old parts is that you are looking at wire resistors encapsuled in ceramics.
:Mostly for low resistance and high wattage.
:I also will like to know from you where I can get the schematics for the Grundig 4570U
I still haven't found the 4570U schematic, walter groer website said he would send it, but wants me to send him cash in the mail, I'm not sure if I should trust it, I might try AG tennenbaum instead. Yes I found the components are capacitors(there were though resistors in the same type package)

:Nate,
:I may be in error, but is there not an ECH81 tube also on the chassis? I have a schematic for the Bella model no. 700W produced in 1955-57. I also have a schematic for the Bella-Luxus model no. 1700W.
:
:The model numbers and schematics are not as important as your question. . .the tubular "dogbone" components used by the European manufacturers (and specifically common within the German radios) are capacitors. They used peculiar EIA markings that could be color related as well as cryptic numbers and letters to identify the capacitor ratings. The 5nKf signifies a 5 nanofarad(5n f) with a tolerance of +/-10percent(K).
:
:I will enlarge my schematics to confirm the old tubulars and await a photo if you wish to send it to me.
:Respectfully,
:Robert
:Will aslo locate the web site that identifies the scheme.
:
:
:
::I have been looking at some tubular components in a 1956 Olympic-Opta Bella 5700W, tube lineup =ECC85,EF89,EABC80,EL84,EM80. I have had these refered to as capacitors from two places, another site shows them as resistors, I think they are coils. One of the larger ones is marked "Rosenthols 300/2 500V" There is a symbol in the middle of the name that I see on other smaller units as well. The components are tubular ceramic with an air core, I can send pictures to anyone that can identify these. Other ones are marked "5nKf" and "30AF" "15AF". I also have a Grundig 4570U with some of these marked "30J" "39J". A schematic for the opta is not available. I could get a schematic for the Grundig, but I that still wouldn't prove what values are in the Opta. Any help is greatly appreciated.

Yes they are caps, I have restored the 5700W to full function. It sounds great. I appreciate your help.

:Nate,
:I may be in error, but is there not an ECH81 tube also on the chassis? I have a schematic for the Bella model no. 700W produced in 1955-57. I also have a schematic for the Bella-Luxus model no. 1700W.
:
:The model numbers and schematics are not as important as your question. . .the tubular "dogbone" components used by the European manufacturers (and specifically common within the German radios) are capacitors. They used peculiar EIA markings that could be color related as well as cryptic numbers and letters to identify the capacitor ratings. The 5nKf signifies a 5 nanofarad(5n f) with a tolerance of +/-10percent(K).
:
:I will enlarge my schematics to confirm the old tubulars and await a photo if you wish to send it to me.
:Respectfully,
:Robert
:Will aslo locate the web site that identifies the scheme.
:
:
:
::I have been looking at some tubular components in a 1956 Olympic-Opta Bella 5700W, tube lineup =ECC85,EF89,EABC80,EL84,EM80. I have had these refered to as capacitors from two places, another site shows them as resistors, I think they are coils. One of the larger ones is marked "Rosenthols 300/2 500V" There is a symbol in the middle of the name that I see on other smaller units as well. The components are tubular ceramic with an air core, I can send pictures to anyone that can identify these. Other ones are marked "5nKf" and "30AF" "15AF". I also have a Grundig 4570U with some of these marked "30J" "39J". A schematic for the opta is not available. I could get a schematic for the Grundig, but I that still wouldn't prove what values are in the Opta. Any help is greatly appreciated.

Nate,
I may be in error, but is there not an ECH81 tube also on the chassis? I have a schematic for the Bella model no. 700W produced in 1955-57. I also have a schematic for the Bella-Luxus model no. 1700W.

The model numbers and schematics are not as important as your question. . .the tubular "dogbone" components used by the European manufacturers (and specifically common within the German radios) are capacitors. They used peculiar EIA markings that could be color related as well as cryptic numbers and letters to identify the capacitor ratings. The 5nKf signifies a 5 nanofarad(5n f) with a tolerance of +/-10percent(K).

I will enlarge my schematics to confirm the old tubulars and await a photo if you wish to send it to me.
Respectfully,
Robert
Will aslo locate the web site that identifies the scheme.

:I have been looking at some tubular components in a 1956 Olympic-Opta Bella 5700W, tube lineup =ECC85,EF89,EABC80,EL84,EM80. I have had these refered to as capacitors from two places, another site shows them as resistors, I think they are coils. One of the larger ones is marked "Rosenthols 300/2 500V" There is a symbol in the middle of the name that I see on other smaller units as well. The components are tubular ceramic with an air core, I can send pictures to anyone that can identify these. Other ones are marked "5nKf" and "30AF" "15AF". I also have a Grundig 4570U with some of these marked "30J" "39J". A schematic for the opta is not available. I could get a schematic for the Grundig, but I that still wouldn't prove what values are in the Opta. Any help is greatly appreciated.

:Nate,
:I may be in error, but is there not an ECH81 tube also on the chassis? I have a schematic for the Bella model no. 700W produced in 1955-57. I also have a schematic for the Bella-Luxus model no. 1700W.
:
:The model numbers and schematics are not as important as your question. . .the tubular "dogbone" components used by the European manufacturers (and specifically common within the German radios) are capacitors. They used peculiar EIA markings that could be color related as well as cryptic numbers and letters to identify the capacitor ratings. The 5nKf signifies a 5 nanofarad(5n f) with a tolerance of +/-10percent(K).
:
:I will enlarge my schematics to confirm the old tubulars and await a photo if you wish to send it to me.
:Respectfully,
:Robert
:Will aslo locate the web site that identifies the scheme.
:
:
:
::I have been looking at some tubular components in a 1956 Olympic-Opta Bella 5700W, tube lineup =ECC85,EF89,EABC80,EL84,EM80. I have had these refered to as capacitors from two places, another site shows them as resistors, I think they are coils. One of the larger ones is marked "Rosenthols 300/2 500V" There is a symbol in the middle of the name that I see on other smaller units as well. The components are tubular ceramic with an air core, I can send pictures to anyone that can identify these. Other ones are marked "5nKf" and "30AF" "15AF". I also have a Grundig 4570U with some of these marked "30J" "39J". A schematic for the opta is not available. I could get a schematic for the Grundig, but I that still wouldn't prove what values are in the Opta. Any help is greatly appreciated.

Yes they are caps, I have restored the 5700W to full function. It sounds great. I appreciate your help.

:Nate,
:I may be in error, but is there not an ECH81 tube also on the chassis? I have a schematic for the Bella model no. 700W produced in 1955-57. I also have a schematic for the Bella-Luxus model no. 1700W.
:
:The model numbers and schematics are not as important as your question. . .the tubular "dogbone" components used by the European manufacturers (and specifically common within the German radios) are capacitors. They used peculiar EIA markings that could be color related as well as cryptic numbers and letters to identify the capacitor ratings. The 5nKf signifies a 5 nanofarad(5n f) with a tolerance of +/-10percent(K).
:
:I will enlarge my schematics to confirm the old tubulars and await a photo if you wish to send it to me.
:Respectfully,
:Robert
:Will aslo locate the web site that identifies the scheme.
:
:
:
::I have been looking at some tubular components in a 1956 Olympic-Opta Bella 5700W, tube lineup =ECC85,EF89,EABC80,EL84,EM80. I have had these refered to as capacitors from two places, another site shows them as resistors, I think they are coils. One of the larger ones is marked "Rosenthols 300/2 500V" There is a symbol in the middle of the name that I see on other smaller units as well. The components are tubular ceramic with an air core, I can send pictures to anyone that can identify these. Other ones are marked "5nKf" and "30AF" "15AF". I also have a Grundig 4570U with some of these marked "30J" "39J". A schematic for the opta is not available. I could get a schematic for the Grundig, but I that still wouldn't prove what values are in the Opta. Any help is greatly appreciated.