Hello, I am having some really wierd things happing with my telefunken opus 7. I hooked up an antenna to the shortwave and found that I get a lot of stations around the world, but there is a dial for sw/am and a dial for fm. When I find a sw station and I turn the fm dial it affects the tuning on shortwave for better or worse. Why is this happing? I also notice the sound is better on sw, less destortion. When I tune in a fm station I can get it in clear, but there is destortion when I turn up the volume. Is there a relationship to the two bands?
Thanks
David

David,

I would not expect any interaction between the FM and the AM/SW tuning normally. I would have to see the schematic to be sure.

Again, not being familiar with your set I can't be sure but FM uses a totally different detection method than AM. So I might be inclined to look at the FM discriminator (detector) for distortion problems. These sometimes need to be aligned.

Tony

:Hello, I am having some really wierd things happing with my telefunken opus 7. I hooked up an antenna to the shortwave and found that I get a lot of stations around the world, but there is a dial for sw/am and a dial for fm. When I find a sw station and I turn the fm dial it affects the tuning on shortwave for better or worse. Why is this happing? I also notice the sound is better on sw, less destortion. When I tune in a fm station I can get it in clear, but there is destortion when I turn up the volume. Is there a relationship to the two bands?
:Thanks
:David

In some German radios the FM tuning cap was parallelled to the normal larger AM tuning cap to function as a fine tuning on SW.

Thanks Rolf,

I was going to suggest that as a possibility, but it seemed so unlikely :).

Tony

:In some German radios the FM tuning cap was parallelled to the normal larger AM tuning cap to function as a fine tuning on SW.

David ,I should have answered your second question too.I'm not sure how experienced you are,but here it goes:What you ALWAYS should do on these radios from the 50's is to replace the waxed paper caps in the LFstage.Since it's a Opus7 in your case it has a PP output stage(part of EABC80,EC92 and two EL84's in push pull).There are three 0.022 uF in this stage-replace them!!Don't even bother to measure them,since they have a leakage problem,which causes more and more leakage as time passes and causes the output valves to draw more and more current and could lead to more serious problems.
If you don't have the schematic ,tell me and I'll help you.

Thanks for your help. I have been looking for a owners manual or schematic for this radio. I got a sams photofact, but its is for the opus 6 even though it was listed as covering the opus 7. There are two versions of the opus 7 and I have the one with the wooden grill in the front.

I just bought a Telefunken Opus 7 and the schematic is missing.
Also the power transformer is not original and the volume control is frozen.
The volume knob is also broken.
All the tubes were missing but i think i have most of them.
I think i will definately need a schematic to get this going.
Thanks,
Anders

:David ,I should have answered your second question too.I'm not sure how experienced you are,but here it goes:What you ALWAYS should do on these radios from the 50's is to replace the waxed paper caps in the LFstage.Since it's a Opus7 in your case it has a PP output stage(part of EABC80,EC92 and two EL84's in push pull).There are three 0.022 uF in this stage-replace them!!Don't even bother to measure them,since they have a leakage problem,which causes more and more leakage as time passes and causes the output valves to draw more and more current and could lead to more serious problems.
:If you don't have the schematic ,tell me and I'll help you.

Hi,
Do you still have the photofact for an OPUS 6? Would you sell it if you don't need it? Would you make a copy? I just got an Opus 6 and need some literature.
Thanks,
Emery

If you are in immediate need of the schematic of that unit, here it is in a very enlarged version:

Right..HERE

Otherwise, for further data to all of the units smaller framo-stats, giggly pins and bi-furcated tensioning adjustments,
they are being forwarded to you also.(Since I see that you supplied a "hot" e-mail
addee)

73's de Edd

:Hi,
:Do you still have the photofact for an OPUS 6? Would you sell it if you don't need it? Would you make a copy? I just got an Opus 6 and need some literature.
:Thanks,
:Emery

Not sure about the Telefunken - but on some of these foreign sets the FM dial also doubles as a band spread.