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Old 13th Mar 2018, 3:34 pm   #31
Nuvistor
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Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,433
Default Re: Bush VHF 81 Restoration

I have checked the Makers circuit and the Trader one, both agree on the voltages and both taken with an Avo 8, the makers circuit states the Avo 8 was used on the 1000v range and the 10 volt range, no distinction is made on the Trader circuit.

Note there are two voltage readings one for MW and one FM, the FM stages will draw extra current and give lower voltages as shown in the voltage table. The HT voltage is high at 220 volts but if that is the reading on MW it is not out of specification, correct reading is shown as 213, that difference does not matter. If its 220 on FM then that may require investigation but it is still not that far out, especially if your mains voltage is high.

Taking the reading on the voltages that are low by 20 to 60 volts, 60 volts low in this set I would investigate, 20 volts low depends on the circuit, it may well indicate a component out of tolerance but the radio perhaps would work ok

Take the readings again and post the results, at least you are using an Avo 8 so that will remove any doubt about meter sensitivity.
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