Hacker Cavalier GP15 buzz - UK Vintage Radio Repair and Restoration Discussion Forum

barnettiuk · 8th Nov 2017, 4:47 pm

About 15-20 seconds after you switch the player on it starts. Sounds pretty much like a wasp- about the same pitch and buzzing. Doesn't increase or decrease by adjusting the volume control. Looked at other posts. Mains capacitors?

Edward Huggins · 8th Nov 2017, 5:59 pm

Yes, both will need to be replaced - they are probably in the one can. Edward

Nuvistor · 8th Nov 2017, 5:59 pm

The volume control is at the start of the amplifier chain so there could be a number of reasons. You need to do some standard fault finding before changing any part.

If the reservoir/smoothing capacitors are leaking or bulged they will require replacement but they many not fix the fault.

What fault finding, test equipment and experience do you have?

barnettiuk · 8th Nov 2017, 7:24 pm

Very little of any. I'll work through the sticky on reviving record players. Thankd for responding. Ian

Nuvistor · 8th Nov 2017, 8:46 pm

Check the g1 coupling capacitors to the output valves, they will probably not be the cause of the buzz but if faulty can damage output valves, transformer etc, lots to check on an old device.

8th Nov 2017, 4:47 pm	#1
barnettiuk Triode Join Date: Nov 2007 Location: South Devon, UK. Posts: 14	Hacker Cavalier GP15 buzz About 15-20 seconds after you switch the player on it starts. Sounds pretty much like a wasp- about the same pitch and buzzing. Doesn't increase or decrease by adjusting the volume control. Looked at other posts. Mains capacitors?

8th Nov 2017, 5:59 pm	#2
Edward Huggins Dekatron Join Date: Sep 2015 Location: Southwold, Suffolk, UK. Posts: 8,338	Re: Hacker Cavalier GP15 buzz Yes, both will need to be replaced - they are probably in the one can. Edward __________________ Edward.

8th Nov 2017, 5:59 pm	#3
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,433	Re: Hacker Cavalier GP15 buzz The volume control is at the start of the amplifier chain so there could be a number of reasons. You need to do some standard fault finding before changing any part. If the reservoir/smoothing capacitors are leaking or bulged they will require replacement but they many not fix the fault. What fault finding, test equipment and experience do you have? __________________ Frank

8th Nov 2017, 7:24 pm	#4
barnettiuk Triode Join Date: Nov 2007 Location: South Devon, UK. Posts: 14	Re: Hacker Cavalier GP15 buzz Very little of any. I'll work through the sticky on reviving record players. Thankd for responding. Ian

8th Nov 2017, 8:46 pm	#5
Nuvistor Dekatron Join Date: Aug 2013 Location: Wigan, Greater Manchester, UK. Posts: 9,433	Re: Hacker Cavalier GP15 buzz Check the g1 coupling capacitors to the output valves, they will probably not be the cause of the buzz but if faulty can damage output valves, transformer etc, lots to check on an old device. __________________ Frank