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 Trying to connect Pye 12G-15 8' to RF modulator
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 Return to top of page · Post #: 1 · Written at 10:06:41 PM on 11 April 2023.
Some Generic Nerd's Gravatar
 Location: Adelaide, SA
 Member since 11 April 2023
 Member #: 2549
 Postcount: 1

I have the RF modulator from a VIC-20 connected via a bunch of adapters to my poppa's old Pye 12G-15 set (yes I know this is overcomplicating everything). RCA male to F-type coax female, coax to a twin prong 75 to 300ohm adapter (https://www.ebay.com.au/itm/402658588970 basically one of these).

I'm not really getting anything out on channel 3 or 4 with any tuning (just static and snow) but I'm also not really sure what I'm doing. I disconnected the two twin prong connectors from their spot as I assume this is connected to the built in antenna (seen here https://www.radiomuseum.org/r/pye_au_12g_15.html# on the back photos) Would appreciate if anyone has the schematics or even advice/guidance on what to check/test?


 
 Return to top of page · Post #: 2 · Written at 7:43:53 AM on 12 April 2023.
STC830's Gravatar
 Location: NSW
 Member since 10 June 2010
 Member #: 681
 Postcount: 1284

Welcome to the Forum from Some Geriatric Nerd.

I think you are right about the white wires being connected to the rabbits ears. But you could check with a resistance test for continuity between them. But shouldn't really prevent the set from working if they are connected. But ideally the rabbits ears should not be connected.

Don't know the modulator so someone else will need to comment on that.


 
 Return to top of page · Post #: 3 · Written at 6:15:13 PM on 12 April 2023.
Labrat's avatar
 Location: Penrith, NSW
 Member since 7 April 2012
 Member #: 1128
 Postcount: 381

Dear Some Generic Nerd.

Loosen the antenna screws on the back of the set and remove the two white leads. One going to the rod aerial, the other to earth.
.Place the two black leads from the mast head balun under the antenna screws.

I have two schematics for this set. 12G-15B, and 12G-15C. Your 8, might be the letter B.

If you un-hide your email, I will send both diagrams to you.

Good luck.

Wayne.


 
 Return to top of page · Post #: 4 · Written at 9:37:56 AM on 13 April 2023.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 2405

Are you sure the Vic 20 modulator output isn't UHF?


 
 Return to top of page · Post #: 5 · Written at 2:31:13 PM on 13 April 2023.
Brad's avatar
 Administrator
 Location: Naremburn, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 7342

Commodore had a mixed bag of output channels across its range. I've never used a VIC-20 but the C-16 outputted to Ch 0 - 1 and the later version of the C-64 outputted to Ch 36.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
A valve a day keeps the transistor away...

 
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