Marconi 2018 help needed - UK Vintage Radio Repair and Restoration Discussion Forum

Porkchop · 7th Aug 2018, 11:34 am

Thanks for opening my thread! Here’s my issue:

I have a Marconi 2018, not the A version. It has been working fine until recently. I purchased an HP 8924C that I’ve been using to do alignments with on radio equipment, so I haven’t used the Marconi in a few months. Even though it displays incorrectly, it is still generating the correct frequency and modulated signal.

When I turn the unit on, an 8 is displayed in the carrier frequency window for a brief few seconds, followed by an 823. When the starting frequency is displayed, 520.0000, it shows as 520.80000. If I change the frequency to say, 27.185 then 27.87500 is displayed. However, the output is actually 27.18500 like I entered. Checking this with a known working radio connected confirms this. It seems to function correctly except for the 8 that continues to be displayed.

I have no repair shops nearby, I have no service manual and I have no idea what’s wrong with it. Can anyone help me out on this? I use the HP often but now and then I’d really like to be able to continue to use my Marconi. I know this is a UK based forum but searching for help via Google didn’t really turn up much here in the US. Any help would be greatly appreciated.

Thanks!

Station X · 7th Aug 2018, 12:05 pm

If you PM me your email address I'll email you the service manual.

Porkchop · 7th Aug 2018, 12:38 pm

Alright, I’ll do that. Thank you.

7th Aug 2018, 11:34 am	#1
Porkchop Retired Dormant Member Join Date: Aug 2018 Location: Wilmington, North Carolina, USA. Posts: 2	Marconi 2018 help needed Thanks for opening my thread! Here’s my issue: I have a Marconi 2018, not the A version. It has been working fine until recently. I purchased an HP 8924C that I’ve been using to do alignments with on radio equipment, so I haven’t used the Marconi in a few months. Even though it displays incorrectly, it is still generating the correct frequency and modulated signal. When I turn the unit on, an 8 is displayed in the carrier frequency window for a brief few seconds, followed by an 823. When the starting frequency is displayed, 520.0000, it shows as 520.80000. If I change the frequency to say, 27.185 then 27.87500 is displayed. However, the output is actually 27.18500 like I entered. Checking this with a known working radio connected confirms this. It seems to function correctly except for the 8 that continues to be displayed. I have no repair shops nearby, I have no service manual and I have no idea what’s wrong with it. Can anyone help me out on this? I use the HP often but now and then I’d really like to be able to continue to use my Marconi. I know this is a UK based forum but searching for help via Google didn’t really turn up much here in the US. Any help would be greatly appreciated. Thanks!

7th Aug 2018, 12:05 pm	#2
Station X Moderator Join Date: Jan 2003 Location: Ipswich, Suffolk, IP4, UK. Posts: 21,287	Re: Marconi 2018 help needed If you PM me your email address I'll email you the service manual. __________________ Graham. Forum Moderator Reach for your meter before you reach for your soldering iron.

7th Aug 2018, 12:38 pm	#3
Porkchop Retired Dormant Member Join Date: Aug 2018 Location: Wilmington, North Carolina, USA. Posts: 2	Re: Marconi 2018 help needed Alright, I’ll do that. Thank you.