Grundig Party Boy 500 Poor FM. - UK Vintage Radio Repair and Restoration Discussion Forum

MALC SCOTT · 28th May 2009, 7:08 pm

Hi, i have just been given this radio from a forum member. It works perfect on AM but very poor reception on FM. I have cleaned the wavechange switches, but no better.

repairman 1234 · 28th May 2009, 7:53 pm

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Hi Malc,

This looks like a nice little radio, hope you can sort the FM problem

I suppose this will be one of those sit down for a couple of hours with the door shut and a cup of coffee jobs

Good luck,

Steve_P · 28th May 2009, 8:47 pm

The service sheet is up top there. Check that the aerial is connected There are 2 coils and a cap that connect the aerial to the set. Check these.

Cheers,

Steve P.

yesnaby · 28th May 2009, 9:28 pm

Hello,

I have one of these. Works great on AM/FM (touch wood!)

Michael

davidw · 29th May 2009, 7:47 am

FM IF alignment? Any sign of disturbed cores in the 10.7Mhz path?

Paul Stenning · 29th May 2009, 10:10 am

Quote:

Originally Posted by yesnaby

Hello,

I have one of these. Works great on AM/FM (touch wood!)

Michael

I have one too and can confirm that the FM is really good when they are working properly. So it is definitely faulty and not poor design. They were released in about 1974 and we had a few at the boarding school I went to as a teenager which is why I was keen to get another one.

I can't help with any definitive suggestions for the fault though. Check the aerial is connected OK (it uses a metal bracket that is soldered to the PCB), check for signs of the alignment being disturbed, and check for cracks in the circuit board in particular near the mountings and aerial. Then cast a suspicious eye over any electrolytics that are only used for FM.

MALC SCOTT · 29th May 2009, 7:54 pm

Hi, many thanks for the replies. I will download the circuit let you know of any repair updates. Cheers, Malc.

28th May 2009, 7:08 pm	#1
MALC SCOTT Octode Join Date: Aug 2006 Location: Willington, County Durham, UK. Posts: 1,499	Grundig Party Boy 500 Poor FM. Hi, i have just been given this radio from a forum member. It works perfect on AM but very poor reception on FM. I have cleaned the wavechange switches, but no better. __________________ Malc Scott

28th May 2009, 7:53 pm	#2
repairman 1234 Retired Dormant Member Join Date: Sep 2007 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 749	Re: Grundig Party Boy 500 Poor FM. Hi Malc, This looks like a nice little radio, hope you can sort the FM problem I suppose this will be one of those sit down for a couple of hours with the door shut and a cup of coffee jobs Good luck,

28th May 2009, 8:47 pm	#3
Steve_P Dekatron Join Date: Sep 2003 Location: Bolton, Greater Manchester, UK. Posts: 6,644	Re: Grundig Party Boy 500 Poor FM. The service sheet is up top there. Check that the aerial is connected There are 2 coils and a cap that connect the aerial to the set. Check these. Cheers, Steve P. __________________ If we've always had it, why is the Car Boot open? You're not sneaking another Old TV in are you...?

28th May 2009, 9:28 pm	#4
yesnaby Octode Join Date: Jul 2005 Location: Newport, Gwent, UK. Posts: 1,623	Re: Grundig Party Boy 500 Poor FM. Hello, I have one of these. Works great on AM/FM (touch wood!) Michael

29th May 2009, 7:47 am	#5
davidw Heptode Join Date: Sep 2006 Location: Woodbridge, Suffolk, UK. Posts: 643	Re: Grundig Party Boy 500 Poor FM. FM IF alignment? Any sign of disturbed cores in the 10.7Mhz path? __________________ Dave G1AGK. My perception is my reality!

29th May 2009, 7:54 pm	#7
MALC SCOTT Octode Join Date: Aug 2006 Location: Willington, County Durham, UK. Posts: 1,499	Re: Grundig Party Boy 500 Poor FM. Hi, many thanks for the replies. I will download the circuit let you know of any repair updates. Cheers, Malc. __________________ Malc Scott