cascode amplifier front end tuner stage of 1960s UHF Band III TV tuners at up to 220MHz. As a frame grid device, they are extremely well constructed and the close electrode spacing gives very low noise and stability, so much so that this series of valves nowadays give excellent service at audio frequencies. In addition, their 7.5 volt heaters will run from a standard 6.3 volt heater supply, but they will perform even better and last longer if the correct heater voltage can be supplied, either from a small transformer overwind or via an individual dropper resistor for each valve.
These particular examples are in pristine, new, clean condition with all original Mullard markings present. They are still in their original Mullard boxes. All have recently been fully tested on my Mullard High Speed Valve Tester and show no faults and 100% of nominal new emission on both sections.
I have more of these should you require them and I also have many new Mazda PCC89s in quantity - see my other listings and do ask if you don't see what you need.
Normally, I wouldn't list such common TV type valves for sale, but several of my customers have requested a reliable source of such components, so happy to oblige. However, I cannot sell them for 99p each as 60+ year old stock takes time, money, space, equipment and knowledge to store and then test and offer for sale as guaranteed items. The workshop rent needs to be paid to!
So, a realistic but reasonable price for a rare chance to acquire a sought after and useful valve / tube in guaranteed, working condition. And ideal item for valve audiophiles, vintage TV set restorers, experimenters and collectors alike.
Why risk a buying an untested 99p valve AND the postage cost, when you can buy guaranteed testing and working ones from Helmore & Hunt?
PCC89 / 7FC7
Heater = 7.5V @ 0.3A
Triode:
Anode / Plate: 90V / 15.0mA / 2.9K
Signal Grid: -1.2V
gm: 12.3ma/V
I offer a full, money back guarantee if you are not completely satisfied with this purchase (see terms). We have been trading since 1927 so bid with confidence. Most of our valves / tubes have been in our own stock room for many, many years. See our EXCELLENT FEEDBACK on quality valves / tubes previously supplied!
We have thousands of valves / tubes in stock - standard and rare; US, UK and European. If you have any particular requirements, please send a message and if we have what you want, we will list it here.
We ship worldwide and are very happy to combine items for multiple postage.
TERMS
GUARANTEE: In case of dissatisfaction, buyer must return item at own expense. We will only refund if you return the EXACT SAME VALVE / TUBE to us that you have purchased, with the heater still intact and passing continuity test. Believe it or not, some evil people have tried to send us back their dud tubes to try and get a full refund for a perfectly good tube we have just sold them! So, refund is a genuine offer, but at our discretion that we have been sent back what we actually sold you in the first place and that you haven't destroyed it through misuse! All returns under guarantee are limited to within 21 days of shipping.
PAYMENT: We accept Paypal, cheques in GBP, UK postal orders / bank drafts or wire transfers. Please CONTACT US FIRST before sending payment by a method other than PayPal - there will be a delay in shipping while we clear your payment if you pay using these other methods. We are happy for you to collect from Bristol, but will require payment in GBP cash on collection.