Raising Finance – Harman Kardon 730 and Pioneer SX-5580

To raise finance for this project (damn money) I have been buying vintage HiFi, fixing them and then selling them on eBay.  At the moment I am working on a Harman Kardon 730 receiver (amp with built in tuner).  Plus a Pioneer SX-5580 which (I believe) is the same as the Pioneer SX-1050 only in black.

Harman Kardon 730 and Pioneer SX-5580 being repaired.

Harman Kardon 730 and Pioneer SX-5580 being repaired.

The Pioneer 5580 is a real monster, difficult to pick up and move and in a bad condition. It blows the mains fuse on start-up. I have only just got started on this one so will let you know how it turns out.

Inside the monster Pioneer SX-5580.

Inside the monster Pioneer SX-5580.

The HK 730 had no sound from the left channel. It turned out to be a varistor in the Power Amp doing strange things so I replaced both with an 1N4148 and now all is well:

Harman Kardon 730 Receiver PA Board.

Harman Kardon 730 Receiver PA Board.

You can see I have also replace those shitty single-turn, carbon variable resistors with decent 20 turn ones. I have also replaced all electrolytic capacitors as they will have dried out after so many decades of use.  All lamps now work and it’s had a good clean-out and hoover. This is a highly respected amp, not just because of its looks (which I do love) but also as it has two totally separate power supplies, one for each channel. So two mains transformers, two sets of double (one for the positive voltage rail and one for the negative) mains capacitors and two bridge rectifiers. My amps will also have two totally separate, high power mains supplies and they are just for back-up and charging of the batteries!

Advertisements

About Matal

Hand made HiFi, photos, a friends poetry.
This entry was posted in Finance and tagged , , , , , , , , . Bookmark the permalink.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s