Want a hum free valve preamplifier? Once you have your HT power supply smoothed and your heater supply centre tap grounded, those high gain valve preamp stages are still prone to picking up radiated interference and hum straight through the glass of the valves. If your valve amp doesn't already have screened sockets, there is a way to fit screening cans without having to rewire all the valves!

This is an Aluminium adaptor for ceramic 9 pin chassis mounting B9A valve sockets to suit 9 pin preamp valves such as 12AX7, 12AT7, 12AU7 and 6N1P. This item consists of a skirted adaptor that will fit in place of the mounting ring on most common B9A chassis sockets (including ours), allowing you to fit a screening can without having to rewire the sockets, a great time saving upgrade! 

Fitting screening cans can work well for noise/hum reduction in high gain preamp stages in guitar amps and home build projects, or for use in Hi-Fi amps.




Mounting hole centres on the adaptor are 27.5mm apart and will accept M3 mounting hardware. 
See our other listing for screening cans.





Assembled using the FreeForm Builder at robshelp.com



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This is NOT possible if you have already paid for any of the items you are ordering.

If this option is not offered in the listing, please use the following listing to pay the extra cost of this.
Tracked & Signed supplemental charge to Italy 

Also note that orders sent to Italy may take MUCH longer than eBays estimate to be delivered and, whilst some orders do arrive within a week or two, many orders sent to Italy are not delivered for three or perhaps even four weeks! This is entirely outside our control, as we ship within two working days and once your order is in the hands of Poste Italiane, there is nothing we can do to get it to you any faster. 

Please DO NOT send messages with the title "Item not received" as these open complaint cases against us and damage our seller rating! Instead please use the general "Other" heading to ask about your delivery if several weeks have passed.

Lastly, all please note that when eBay asks you "Did the item arrive on or before" their estimated delivery date, it also damages our seller rating if you answer "No", so bear in mind that we always ship within two working days, so if you answer "No" because your local postal service (especially in Italy!) has taken weeks to deliver, you are punishing us, not them!

Thank you all for your kind consideration of the above and remember that we will always do our very best to sort out any problems or questions you may have related to your order if you contact us using the "Contact Seller" and (if the choice is given) "Other" ask a question of seller options.

This product was available for sale in the EU prior to December 13th 2024
Want a hum free valve preamplifier? Once you have your HT power supply smoothed and your heater supply centre tap grounded, those high gain valve preamp stages are still prone to picking up radiated interference and hum straight through the glass of the valves. If your valve amp doesn't already have screened sockets, there is a way to fit screening cans without having to rewire all the valves! Also note that orders sent to Italy may take MUCH longer than eBays estimate to be delivered and, whilst some orders do arrive within a week or two, many orders sent to Italy are not delivered for three or perhaps even four weeks! This is entirely outside our control, as we ship within two working days and once your order is in the hands of Poste Italiane, there is nothing we can do to get it to you