ekco: SW86 (SW 86);

Hello Radiofriends,

 

 

It would like somebody to confirm me if this disposition of valves is correct?.

 

I ask for this help because I still didn't get the schematic of SW86

 

  

When the radio came for my hand had the two valves 6D6 as 1.º and 2.º to stage, (RF and 1.ª detector) and the IF is with the illegible reference. I think to be a 6C6, and in this case it will be out of the position, am I correct?

To see enclosure:

 

 

 Cordially,

Júlio Branco

GR: picture width adjusted

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most probably the complement is:

6D6 in RF stage (remote cutoff pentode for AVC)
76 oscillator triode
6C6 mixer (sharp cutoff pentode)
6D6 in IF stage (remote cutoff pentode for AVC)
75 for Demodulation, AVC and 1st AF stage
42 as 2nd AF
80 for Rectifier

As far as I can see without a closer look to the under chassis coils and wiring, Your pictorial allocation appears reasonable, under the assumption that the lower cap.section is the input (antenna), the middle section belongs to the RF anode/ mixer grid circuit, and the top (front) section ist the oscillator part.

A 6C6 for IF is not useful, due to its sharp cutoff characteristic, while that makes it suitable for the mixer stage. Those days AVC was preferably applied to RF and IF only, where e.g. a 6D6 with its remote cutoff characteristic is suitable.

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Hi Julio

I uploaded the schematics for the SW86. Enjoy the radio.

Wolfgang

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Hello, Mr's  Konrad and John

I want here to state my more sincere gratefulness to the Gentlemen Konrad and John, for the excellent aid that had given to me, not focus Mr. Wolf of New Zealand, for already done having saw email.

With these precious aids already I find me to restore Ekco SW86.

Opportunely I will put the radio in this forum thus that it will have soon. Already I ordered to make one main to transformer and to transformer of audio, (output).

 

Cordially

Júlio Branco

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just an aftermath:
the schematic shows no AVC for the RFstage, where in this case the 6C6 would apply.
Both mixer and IF receive AVC voltage, hence two 6D6 are fine.

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Hi all radio friends,

 

My Ekco is already as, it was after having restored.

I already upload it in Rmorg, it is an spectacle, as good audio quality for the time, and with a lot of sensibility of reception of radio frequency in all of the bands. I was very happy after having concluded the work and it would not get it if it didn't go with my friend collaboration and of other members.

 

Thanks for yours collaboration.

CORDIALLY,

Best regards

Júlio Branco

 

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Dear Júlio
I'm glad that you now have all the information about your set.
You made a nice inquiry with an integrated picture in your post 1.
There you have questions and you are not sure if your naming of the tubes is correct.

Now the last picture, it is in post 7, would have much better not having been loaded up but you could just link the model - besides that the article is correctly put to the model ;-)

Why should we not upload integrated pictures which one shows already in the model page?
Well, you had to upload the same picture you show (hopefully) in the model page again. This then goes to the server and you can use it with your editor. So we have a useage of up to twice the space necessary. Important: Also if you now delete the picture in the post (you should not) the space will be taken since we can not delete the picture on the diskspace itself if it is uploaded to your editor. This is the important fact!

Your picture does not really matter - but we show more than 300 000 pictures and if this get's a custom then we waste soon a lot of space - I just wanted to inform each member who reads this.
This enables others to understand when a picture is good and when it is better loaded up to the model. For instance a repair story shoud have integrated pictures if you show certein parts - not the model or chassis as such.

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