Roberts R505 - No VHF/FM

[Turnip]

Hi folks,

Got one in for repair and needing a 9v centre negative PS as Roberts are awkward.

AM is fine but not a squeak from FM. Note it uses a Mullard LP1402/2 module incorporating tuning cap for AM and FM and a couple of grounded base transistors for the VHF side.

Any ideas ? - Chris

Attach some info.

[mend it]

Mullard_LP1180-1402 data all I have

[jordan]

http://www.ebay.co.uk/itm/Roberts-R505-Mullard-LP1402-2-Tuner-Module-Complete-for-Parts-/121567235154

[Turnip]

Hi Jordan - Thanks a lot.

Noticed if I tapped the set, FM would appear. Checked around and found the chassis return from the tuner hadn't been soldered to the PBC - Just pushed through the hole, but guess working on and off for some years.

FM reception really good - Chris

Later - Supplied a 9v S/M PS but cust complained it was fine on battery but using the S/M PS caused reception problems I hadn't noticed - Found up a transformer one giving 13v off load - Seems OK.