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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022

 

Beomaster 2200, Type 1601

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arty1941
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arty1941 Posted: Sun, Jan 12 2020 5:42 AM

Wondering if someone could tell me how to get MW when the push buttons have Am - FM only. When I press AM all I get is LW. What am I missing ?

Thanks Rudy

Dillen
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Dillen replied on Sun, Jan 12 2020 7:35 AM

The user manual seems to be what you are missing.
You switch between LW and MW by pressing down on the tuning wheel.

Martin

arty1941
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arty1941 replied on Sun, Jan 12 2020 10:36 PM

Thanks Martin I will check it out today.

Regards

Rudy

arty1941
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arty1941 replied on Sun, Jan 12 2020 10:49 PM

One other question, the output emitter bias resistors in the circuit show .39 ohms, R26-27, mine had 1 burnt & oc are .202 ohm, the closest I have is .22 ohms .

THere is a slight difference in the current reading, would it be better to replace both to .22 ? 

Dillen
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Dillen replied on Mon, Jan 13 2020 8:30 AM

The two emitter resistors should be identical.

Martin

arty1941
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arty1941 replied on Mon, Jan 13 2020 12:28 PM

Hi Martin,

First all thanks about the LW & MW function.
I realize that should be both the same, should the value be what is in the unit or the schematic. The ones in the unit look original. I think  why one burnt was because of the spring clip which retain the output module heat sink. When I originally removed the module to replace all the red caps, the clip must have dropped inside, something  shorted on switch on. The seconday fuse blow instantly which prevented any further damage.  When I removed the module again to check all my work and the darlington outputs as well as every transistor, I could not find a cause. To prove it I exchanged the outputs, heat sink and all, with each other. All worked fine except for the difference in bias. 
Regards
Rudy
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