Unitra Klaudia rms 801 Radio: Tuning Issues, VHF Range, Capacitors, BF195 vs BF215 Transistors

Hello I dug up my parents' old wedding gift at home, that is, as in the topic of radyjko Unitra. He is 100% running (everything works) and he plays beautifully and he is already old . Well, due to the fact that it works on the old VHF, I wanted to tune it, so I covered the capacitors as it was in this post:

https://www.elektroda.pl/rtvforum/topic1811090.html

and, as always, there must be some stairs :P

1.Radio receives on the new VHF but I have a literally marginal range of regulation, as I look at the stations it is about 5Mhz.

2. and I have some different elements used than in the diagrams. I mean the transistors and coils in the head. There are BF195 everywhere in the diagrams, and I have BF215 (I do not know if this is a problem), and as for the coils, they are different (adjustable) than in the photo from the post above




I tried to adjust something with the coil and trimmer, but only managed to get a slight shift of the range by about 3Mhz up or down. Reception is only in the lower VHF range. I managed to catch RMF`FM (92.9) radio Maryja, radio family and some other stations in my area (Wrocław)


Would some good soul help with advice and experience in such treatments?

greetings

Hello
You chose a buddy "recipe", which did not know how it ended.
I propose to write to the author of the topic at PW, whether he was successful, or should you choose a different path.
What did you measure this 5 MHz?
Greetings.

Before starting the action, of course, I did more research than just this one post, and in each recipe there was the same scheme for replacing and removing capacitors capacitors.

After the radio stations.

Set the scale to about 88 MHz, you set the frequency with the L305 core, then around 108 MHz, with the C315 trimmer (next to the L305). Repeat this procedure several times. Sensitivity on 88 MHz L302, on 108 MHz C306, also repeat a few times and it has to be, do not unwind the coil, stretch it a little.

There will be time for tuning. I think that the author's scale is too "narrow" and the whole VHF band does not fit there.
I propose to reduce some capacitance parallel to the heterodyne coil. I had a similar problem but the opposite and I had to increase the capacity. A frequency meter would be nice, even one from an old car radio - 10 minutes of work and how useful.

Well, there will be a problem with stretching the coil. In this post, what I gave in the photo is an ordinary coiled wire and for me this coil looks like L305? (the one from the regulation) so I would have to desolder it and screw the new one.

Added after 1 [minutes]:

Olek II wrote:

Set the scale to about 88 MHz, you set the frequency with the L305 core, then around 108 MHz, with the C315 trimmer (next to the L305). Repeat this procedure several times. Sensitivity on 88 MHz L302, on 108 MHz C306, also repeat a few times and it has to be, do not unwind the coil, stretch it a little.

That's what the problem is with. I can't catch any further frequency.

Apparently you have a coil with a core. Just a different head design.
Combining with unwinding coils is the last resort - I know what I am writing. Wait for the other ideas to run out.

Try treatment with # 5

Exactly. It has an adjustable core and it does not change anything whether it is in the coil or there is no change in reception.

Added after 2 [minutes]:

Old car radios will be found I even have some stumbling blocks around the electro maneli. If you have any idea how one could help, no problem.

Hello.
You tried by. this description?
Greetings.

Pazałsta:
https://www.elektroda.pl/rtvforum/topic3371519.html

Thank you very much for all your help. Unfortunately, the topic is suspended for a week because I am going on vacation. When I come back I will continue the topic.

greetings

Recently I received from my colleague Andrzej L.
You will have reading for the holidays
http://andx.w.interia.pl/przestrajanieUKF.rar

Hello..
Try it out
Replace C301 (120p) with 68p, C302 (82p) with 47p, C303 (47p) with 27p, C310 (56p) with 39p, C318 (2p2) with 1p. Remove C305 (27p), short C317 (75p). Unwind 4 turns from the top of the L305 and move the tap 2 turns down.

greetings..