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Vintage Radio (domestic) Domestic vintage radio (wireless) receivers only.

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Old 24th Apr 2019, 9:04 am   #41
John10b
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Default Re: Bush DAC90A only receives 2 stations

The shunt across the dial lamps is 250 ohm 6 watt, according to my Bush service sheet.
Cheers
John
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Old 24th Apr 2019, 12:35 pm   #42
mike1 ryan1
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Default Re: Bush DAC90A only receives 2 stations

It was later changed to a 75ohm and the current limiting resistor to v5 was also changed. I think one service data sheet shows 250ohm and one shows 75ohm.
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Old 24th Apr 2019, 3:35 pm   #43
John10b
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Default Re: Bush DAC90A only receives 2 stations

Hi I think you are correct, on my Bush service sheet is it shown as 250 ohm and a picture of another one shows 75 ohm. So you need to double check your chassis values. As a matter of interest are you using the Trader service sheet, if so what is the reference number please.
I’m sure members who specialise in Bush DAC90A can confirm.
Cheers
John
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Old 24th Apr 2019, 3:44 pm   #44
ms660
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Default Re: Bush DAC90A only receives 2 stations

Trader sheet....scale lamp shunt...R18....75 ohms.

The story goes that the value was changed from 250 ohms to 75 ohms to give the scale lamps a better chance in a hot switch on scenario.

In Post#5 here:

https://www.vintage-radio.net/forum/...ad.php?t=97482

Lawrence.

Last edited by ms660; 24th Apr 2019 at 3:48 pm. Reason: link
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Old 24th Apr 2019, 5:24 pm   #45
John10b
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Default Re: Bush DAC90A only receives 2 stations

Thank you Lawrence for the info and the link, I’ll put a note on my service sheet.
Cheers
John
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