Philips Mullard EF37A EF36 NOS ideal for Leak TL 12.1 Valve Amplifier Click image to enlarge Description Philips Mullard EF37A Audio Pentodes circa 1960s RARE   A rare pair of N.O.S. of Philips Mullard Miniwatt EF37A  audio pentodes, circa late 1950s early 1960s. Made in Great Britain,  Philips/Mullard  Blackburn, plant with the same batch and date codes. The EF37A was the most refined evolvement of the famous EF36 pentode employed as the front end amplifier used in the very first series of the famous Leak TL 12.1 KT66 amplifier, later this was updated to the EF37 and then the EF37A. I have several Leak TL12.1s and I have found the choice of well-matched and performing EF37As is paramount for excellent performance and in my opinion the best sounding front end tube for the Leak and other tubes amps. Measured for emission, leakage and mutual conductance and both exceed the specification for a NEW EF37A. A new tube is specified at Ip=1.8mA, and gm = 3.0mA/V.  Tube 1) Ip= 4.5ma. gm= 2.0mA/V, Tube 2) Ip=4.1mA, gm=2.1mA/V.Please check out my other auctions for interesting early HiFi items. Images sell! Get Supersized Images & Free Image HostingCreate your brand with Auctivas Customizable Templates. Attention Sellers - Get Templates Image Hosting, Scheduling at Auctiva.com. Track Page Views WithAuctivas Counter

Leak TL12.1 with KT66 good serviced pair Leak TL12.1 with KT66 good serviced pair Pictures sell! Auctiva offers Free Image Hosting and Editing. The complete eBay Selling Solution.

Leak TL12.1. transformers etc. All good, basically functioning but will require re-commissioning for general use. Very original C/W pre-amp and top cover (removed for pictures). Note, overseas buyers please wait for invoice. Postage will vary between countries. Please watch my auctions as I have many more audio tubes to list together with rare early electronic equipment and radios. IMPORTANT INFORMATION I am selling vintage electronic items, these are by their nature are very old and fragile. Every care will be taken to ensure that they are packed well and reach you in the condition they leave me. POSTAGE:If winning bid is outside the UK please wait for my invoice before making payment. This will enable me to check and confirm the correct postage and include discounts for multiple purchases. The OVERSEAS rate is a guide only.Postage covers insurance up to the value of 41.00 for a lost item, it does not cover breakage of glass as this cannot be insured. I quote a standard cost for International postage and will refund any difference over exact cost minus packing materials.All overseas packages will be sent International signed for/tracked. DESPATCH:I always post within 7 working business day FEEDBACK:If for any reason you believe the item not to be as described in the auction or for that matter any other problems please contact me first before leaving bad star ratings and / or negative feedback. If you are not happy please lets sort things out amicably.

You are bidding a genuine Leak 12.1 Mains Transformer working at 110/130 Volts DC. I suits Countries such as Japan and US where AC is 110 Volts Such a Mains Transformer is open frame, earliest one and rare I has NOT been tested and will be sold as seenPS: I accept return if posted in the UK. If posted outside the UK I do NOT accept return, its too heavy to bear shipping cost on my side so no return Please check my other auction for Leak 12.1 parts Immediate payment required for this item! This is due to time-wasters who refuse to pay. If payment is not received within 24 hours I will sell it to second highest bidder without any further warning! Thanks Happy biddingI ship worldwide.UK GBP 15; Europe GBP 25; Asia: Hong Kong Taiwan China South Korea Japan GBP 60 USA GBP 60

Philips Mullard EF37A EF36 NOS ideal for Leak TL 12.1 Valve Amplifier Click image to enlarge Description Philips Mullard EF37A Audio Pentodes circa 1960s RARE   A rare pair of N.O.S. of Philips Mullard Miniwatt EF37A  audio pentodes, circa late 1950s early 1960s. Made in Great Britain,  Philips/Mullard  Blackburn, plant with the same batch and date codes. The EF37A was the most refined evolvement of the famous EF36 pentode employed as the front end amplifier used in the very first series of the famous Leak TL 12.1 KT66 amplifier, later this was updated to the EF37 and then the EF37A. I have several Leak TL12.1s and I have found the choice of well-matched and performing EF37As is paramount for excellent performance and in my opinion the best sounding front end tube for the Leak and other tubes amps. Measured for emission, leakage and mutual conductance and both exceed the specification for a NEW EF37A. A new tube is specified at Ip=1.8mA, and gm = 3.0mA/V.  Tube 1) Ip= 4.5ma. gm= 2.0mA/V, Tube 2) Ip=4.1mA, gm=2.1mA/V.Please check out my other auctions for interesting early HiFi items. Pictures sell! Auctiva offers Free Image Hosting and Editing.300+ Listing Templates! Auctiva gets you noticed! The complete eBay Selling Solution. Track Page Views WithAuctivas Counter