Forums :: NEW! Web Resources :: Features :: Photo Gallery :: Vintage Radio Shows :: Archives
Support This Site: Contributors :: Advertise


It is currently Oct Tue 19, 2021 4:01 pm


All times are UTC [ DST ]





Post New Topic Post Reply  [ 5 posts ] 
Author Message
 Post subject: German radios
PostPosted: Sep Sun 19, 2021 2:08 am 
Member
User avatar

Joined: Mar Thu 04, 2021 2:18 am
Posts: 521
Location: New Hampshire
Hello all,

A friend of mine who is a Ham radio operator out west was wondering if I could get his Telefunken Kavalier working for him. It's a german radio with SW, FM, and AM. Here's the radio museum link- https://www.radiomuseum.org/r/telefunke ... _3291.html

He tried it on all the bands and he said it just makes a crackle when turned on. My guess was a bad electrolytic in the output stage.

My question is, Are these german radios difficult to work on? This model looks like it has multiple circuit boards.


Would like to hear from others who have worked on this set in the past.

Thank you,
Henry


Top
 Profile  
 
 Post subject: Re: German radios
PostPosted: Sep Sun 19, 2021 6:52 am 
Member
User avatar

Joined: Aug Thu 26, 2021 8:07 am
Posts: 82
Location: Ukraine
Hi Henry!

All German radios of those years are similar and nothing complicated. Naturally, they need cleaning, replacement of electrolytic capacitors and alignment. You has to be careful with gentle gemanium transistors only.

I recently renovated a similar radio

https://antiqueradios.com/forums/viewtopic.php?f=4&t=401450

_________________
i'm not sad i'm sober


Top
 Profile  
 
 Post subject: Re: German radios
PostPosted: Sep Sun 19, 2021 7:43 pm 
Member
User avatar

Joined: Mar Thu 04, 2021 2:18 am
Posts: 521
Location: New Hampshire
Thanks, Vlad!


Top
 Profile  
 
 Post subject: Re: German radios
PostPosted: Oct Wed 06, 2021 5:37 am 
Member

Joined: Apr Sun 08, 2007 6:47 am
Posts: 4968
Location: British Columbia
If it has any AF117 transistors in it that may explain why it's dead, those like to develop tin whiskers inside the can, which cause them to short. You can either remove the whiskers (there is a procedure for this) or substitute the AF117s with a Soviet substitute.
Regards
Arran


Top
 Profile  
 
 Post subject: Re: German radios
PostPosted: Oct Wed 06, 2021 7:23 am 
Member
User avatar

Joined: Aug Thu 26, 2021 8:07 am
Posts: 82
Location: Ukraine
Arran wrote:
or substitute the AF117s with a Soviet substitute.
Regards
Arran


Also a bit of a problem. In a GrĂ¼ndig C4500, which is of no value, but great for a background in a garage (also surprisingly good on SW), I changed the original transistors (10 euros for pair) for Soviet Đ“Đ¢402/404 (0.7 euros). Ugly, but works.

Attachment:
File comment: AC187
IMG_20210908_134037.jpg
IMG_20210908_134037.jpg [ 559.56 KiB | Viewed 135 times ]


Attachment:
File comment: GT402
IMG_20210916_142947.jpg
IMG_20210916_142947.jpg [ 356.2 KiB | Viewed 135 times ]


Attachment:
File comment: new
IMG_20210917_002111.jpg
IMG_20210917_002111.jpg [ 535.9 KiB | Viewed 135 times ]


Attachment:
File comment: C4500
IMG_20210917_201959.jpg
IMG_20210917_201959.jpg [ 515.09 KiB | Viewed 135 times ]

_________________
i'm not sad i'm sober


Top
 Profile  
 
Post New Topic Post Reply  [ 5 posts ]  Moderator: Dave Doughty

All times are UTC [ DST ]


Who is online

Users browsing this forum: mfm197857 and 10 guests



Search for:
Jump to:  


































Privacy Policy :: Powered by phpBB