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Part list HF Pa Unit

 

I am looking for a parts list of the hf pa unit, because in the diagram a number of parts are marked with *** and no value. Such as R5030, R5031, R5013, C5143, and R5038.
 

Download the Service manual, also look for some good circuit diagrams they are on these forum.

73

Andrew away from my PC at home

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On 4 Aug 2024, 08:44, at 08:44, Erik Rothuis <erothuis@...> wrote:
I am looking for a parts list of the hf pa unit, because in the diagram
a number of parts are marked with *** and no value. Such as R5030,
R5031, R5013, C5143, and R5038.
 

Asterisk on a schematic usually indicate parts not used or that they are factory selected parts in a tuned circuit.?
 

I'd like to have the service manual, where can I find it?
 

Here.? Just click on the files tab.
 

Thanks for replay. But in the schematics that I downloaded here, the components are also marked with ***. If that meens that they are selected parts, how do you know what part to use? Because there are many parts in the schematic, with the value ***.
?--
Greetings from Erik Rothuis (PA2ER), Terborg Netherlands.
 

First thing to do is see if the parts are even in the radio.? You will frequently find parts not used.? If they are used it's frequently in a tuned circuit like a filter network.
?
What are you trying to diagnose/repair?? What is the problem your having?
 

I am repairing a FT847 from a fellow amateur. How is complaining on broken-up audio, on more then 50 Watt HF. First we thought of RFI coming back to the mic, but that was not the case, because it happend on more antennas.
Now i have the transceiver here, in mij workshop. I found out that on his power cord, he had 2 banana plugs, one cheep one, and a good one. The cheep was very loose in the socket, and was not cooping with the power, so there was a powerdrop of more than 3 volt. I changed the banana plug and the transceiver is working fine now.
?
What i found was that the ALC meter never exceeded above the? max limit, even with compressor on. Is that normal on a 847?
?
--
Greetings from Erik Rothuis (PA2ER), Terborg Netherlands.
 

Sounds like it is working

73

Andrrw

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On 10 Aug 2024, 20:36, at 20:36, Erik Rothuis <erothuis@...> wrote:
I am repairing a FT847 from a fellow amateur. How is complaining on
broken-up audio, on more then 50 Watt HF. First we thought of RFI
coming back to the mic, but that was not the case, because it happend
on more antennas.
Now i have the transceiver here, in mij workshop. I found out that on
his power cord, he had 2 banana plugs, one cheep one, and a good one.
The cheep was very loose in the socket, and was not cooping with the
power, so there was a powerdrop of more than 3 volt. I changed the
banana plug and the transceiver is working fine now.

What i found was that the ALC meter never exceeded above the? max
limit, even with compressor on. Is that normal on a 847?

--
Greetings from Erik Rothuis (PA2ER), Terborg Netherlands.

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