Thank you to our Sponsors
Hello
I am reparing an Beomaster 700 with not so good fm reception. From what I can read on former posts on the beomaster 700 and 900, replacing the two IF transistors should do the the trick. The only problem is that I cant figure out what that is. I search on different electronic component suppliers (in Denmark), but cant find anything called this.
Do they go under another name?
Hey - can you provide more of the description / post that talks about these components.
I've not personally heard of IF transistors, but perhaps with some additional material it would help you find the answer you need.
Either cut & paste, or send a link.
Best
Tom
Maybe IF="Intermediate Frequency"? An example of "additional material" (is it even the same tuning method?) showing "IF transistors" as part of an R/C filter circuit would be at:
http://philsvalveradiosite.co.uk/philsvalveradiosite/pulsecountingfmreceiver_1.htm
I would think the writer was referring to the transistors used in the tuner's IF section. The service manual should show that section and what type of transistors that are there.
-sonavor
Although not my query, but absolutely fascinating Dillen - thanks for the share.
It looks like AF116's and AF117's are available on the secondhand market for a direct replacement ... but there's also AF126's and AF127's that supposedly don't exhibit the Tin Whisker phenomena and are a comparable replacement.
Good luck TheMac!
I would neither buy nor fit AF116 or AF117 again.
They will develop tin whiskers regardless of being used or not.
AF126 and AF127 will often work fine as replacements though I often use AF109r for 1.st IF and AF179 for 2nd IF.
Martin
Okay.
Thank you very much for all the answers.
This has given me a better understanding of the terminology.
You must be logged in as a BeoWorld member to post replies to forum threads.
Register to access the forums, reference material, and exclusive member benefits — including our monthly prize draw.
Become a Member