42-1008 - Printable Version

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+--- Thread: 42-1008 (/showthread.php?tid=19573)

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42-1008 - rperry - 01-25-2019

Greetings,

So this nice little RCA jack they put on the phono transformer is very convenient in today's world, however when I plug into it and play through my phone the signal is very weak and seems un-amplified, is that normal or should it be amplified like the radio? Also what would that plug have been used for in 1941? Thanks in advance

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RE: 42-1008 - gary rabbitt - 03-16-2019

Hi,
Most players or phones have a low impedance output. The phono input may have been designed for a higher impedance device, and there will be a mis-match. I know what you're talking about though, you have to turn the player on full, and the radio almost full to hear it.
Some have used a matching transformer between the input and the output of the player.
Also, you have to combine or 'sum' the left and right outputs of the player. I've used a couple of 2K to 5K resistors in series with the L and R outputs, then feed that mono signal into an input. That though will not solve your impedance match.
We don't know the model of RCA you're using. But that generally, is what the issue is. The radio/amp input is looking for a high impedance source, and your player is low impedance. Take care.

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RE: 42-1008 - NostalgiaRadioTime - 03-16-2019

Here's what I use to combine the left and right channels for radios equipped with an RCA jack for phono input:

the cable:
https://www.amazon.com/gp/product/B00GXQP6R2/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

and the splitter:
https://www.amazon.com/gp/product/B004C8I88W/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1

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RE: 42-1008 - rperry - 03-16-2019

Great info ,thank you, Ill pick up a splitter and see if that helps the situation any

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