Need Help With Early 60's Transistor Radio

[crs1]

i know where you are coming from i was 30 before i went to school for it

 

[65blkbkgt]

That was smart and fortunate. If I had only known.

I figure now that if I'm interested enough in something I can learn it with practice, a schematic and asking the right questions.

 

[65blkbkgt]

So how do I know if the trim cap is bad? I have another radio just like it I can change switch them.

 

[crs1]

there you go its alot of fun just seeing what you can fix and a good way to learn (i dont know is not an answer) look it up or just ask

 

[crs1]

So how do I know if the trim cap is bad? I have another radio just like it I can change switch them.

you can try that but if it is a good one i wouldent mess it up

 

[65blkbkgt]

If you have enough interest in something the answers are all here on the internet.

I'm SO glad I found this forum!

 

[crs1]

to know if it is bad you need to know the value and use a meter on it with capacitance

 

[65blkbkgt]

I have a cap meter I've never known how to use (if you can imagine that). It's a nice one made by Tenma.

 

[65blkbkgt]

I always buy all these things figuring I'm going to need them down the line.

Buy now, learn to use later. That's my motto. LOL!

Does the radio need to be powered on to check capacitance?

 

[crs1]

If you have enough interest in something the answers are all here on the internet.

I'm SO glad I found this forum!

try this do you have a chip around like a well try in google do a search for a lm555cn it will give you the spec. sheet in pdf file of any component

 

[65blkbkgt]

You had to go and suggest I do that search. Now I'll want to stay up ALL night looking for stuff! Ay ay ay........

Danger Will Robinson, DANGER!

 

[crs1]

I have a cap meter I've never known how to use (if you can imagine that). It's a nice one made by Tenma.

that is the brand i have if you don't care if you take the other radio apart take one out solder so small wires on the legs and on your meter there should be two slots put the range on the lowest uF setting and insert the legs in the meter and see what you get the measure the one on the bad radio and compare

 

[crs1]

You had to go and suggest I do that search. Now I'll want to stay up ALL night looking for stuff! Ay ay ay........

Danger Will Robinson, DANGER!

i know i have over 1000 chips around here been there done that got the t-shirt

 

[65blkbkgt]

that is the brand i have if you don't care if you take the other radio apart take one out solder so small wires on the legs and on your meter there should be two slots put the range on the lowest uF setting and insert the legs in the meter and see what you get the measure the one on the bad radio and compare

i know i have over 1000 chips around here been there done that got the t-shirt

The lowest setting is 2UF. Then it has a black wire and a red wire with different slots on the bottom of the face of the meter.

 

[crs1]

The lowest setting is 2UF. Then it has a black wire and a red wire with different slots on the bottom of the face of the meter.

are they marked Cx above the slots and 2uF is what you need those caps are in pico farad and nF is too low that is nano

 

[65blkbkgt]

Okay........I'm old enough to know that it's time to go to bed and digest the information you've been so generous in sharing with me.

I'll be back at it tomorrow and test that cap with the meter and let you know the results.

I hope you won't mind if I ask you questions (like ****loads of questions). Like "cycle the tuner"?

 

[crs1]

no not at all glad to help you can also e-mail me at chris_schibik2000@yahoo.com any time

 

[65blkbkgt]

Yep, CX above the two slots

 

[crs1]

good deal try it tomorrow and let me know if you need more help

 

[65blkbkgt]

I will Chris. Thanks a lot for your help. It's appreciated.