Tannoy - Original Crossover Refurbishment Service

[Reffc]

As well as the design and construction of new fixed inductor circuits for Tannoy vintage drivers, RFC also offers a fully comprehensive service for refurbishment of existing crossovers.

Here are some photos of a completed Tannoy Crossover refurbishment project to illustrate some of the work.

These crossovers are for a set of HPD 385 drivers but the work is the same whether it be Monitor Golds or HPDs:











The work involves:

• Complete strip down of crossover
• Cleaning of existing switches
• removal of existing capacitors
• removal of all existing hot melt glue where used
• a full clean of the existing PCB and re-flowing of solder joints
• New high quality polypropylene capacitors of appropriate value and type
• Re-assembly of crossover
• removal of existing input/output wiring and replacement with quality OFC wiring
• provision and fitting of a new gold plated (improved design) 4 pin driver connector
• Full testing and inspection

The cost for all of this work is £225 plus P&P which is very reasonable considering how labour intensive it is. That covers all of the new components and labour.

The cost is the same for all MG and HPD crossovers and this work will restore them to BETTER than new factory specification. The only thing likely to ever need doing again (approx once every 5 to 10 years) is routine cleaning of the switches.

All components are selected to 3% tolerance. For a modest additional fee, components matched to within 1% can be specified.

Please either use my website contact form or PM me here if you would like your Tannoy crossovers given a new lease of life!

[stevied]

[QUOTE=Reffc;622060]As well as the design and construction of new fixed inductor circuits for Tannoy vintage drivers, RFC also offers a fully comprehensive service for refurbishment of existing crossovers.

Here are some photos of a completed Tannoy Crossover refurbishment project to illustrate some of the work.

These crossovers are for a set of HPD 385 drivers but the work is the same whether it be Monitor Golds or HPDs:











The work involves:

• Complete strip down of crossover
• Cleaning of existing switches
• removal of existing capacitors
• removal of all existing hot melt glue where used
• a full clean of the existing PCB and re-flowing of solder joints
• New high quality polypropylene capacitors of appropriate value and type
• Re-assembly of crossover
• removal of existing input/output wiring and replacement with quality OFC wiring
• provision and fitting of a new gold plated (improved design) 4 pin driver connector
• Full testing and inspection

The cost for all of this work is £225 plus P&P which is very reasonable considering how labour intensive it is. That covers all of the new components and labour.

The cost is the same for all MG and HPD crossovers and this work will restore them to BETTER than new factory specification. The only thing likely to ever need doing again (approx once every 5 to 10 years) is routine cleaning of the switches.

All components are selected to 3% tolerance. For a modest additional fee, components matched to within 1% can be specified.

Please either use my website contact form or PM me here if you would like your Tannoy crossovers given a new lease of life!

very good !

[walpurgis]

That looks a cracking job Paul. Most impressive. The replacement four pin plug is a very nice touch.

[Reffc]

Thanks chaps. Yes the 4 pin plugs are excellent. As they're sprung loaded, they make very firm contact with the sockets. I can replace the existing speaker driver sockets too but I find that with a clean-up, they're usually fine. Its the older style plugs which really aren't very clever by design.

[Barry]

Thanks chaps. Yes the 4 pin plugs are excellent. As they're sprung loaded, they make very firm contact with the sockets. I can replace the existing speaker driver sockets too but I find that with a clean-up, they're usually fine. Its the older style plugs which really aren't very clever by design.

Those 4-pin plugs were designed as battery connectors. Valve portable radios of yesteryear, before the coming of transistor radios, were powered by a battery supplying 90V (for the HT) and 1.5V (for the heater filament). The two battery supplies (in a single package) were connected by a 4-pin socket, as used by Tannoy DC drive units.

The same sytle 4-pin plugs were used by Quad to connect the power supply of the Quad 22 to the Quad AM2 and FM1 tuners.

[Reffc]

Those 4-pin plugs were designed as battery connectors. Valve portable radios of yesteryear, before the coming of transistor radios, were powered by a battery supplying 90V (for the HT) and 1.5V (for the heater filament). The two battery supplies (in a single package) were connected by a 4-pin socket, as used by Tannoy DC drive units.

The same sytle 4-pin plugs were used by Quad to connect the power supply of the Quad 22 to the Quad AM2 and FM1 tuners.

That's right Barry. Trouble is with age, they can get quite sloppy fitting and they do corrode. I've had some which practically fall into the sockets! They're not great quality things and the new ones are much, much better.