Valves
Cryo Valves
Kits
Speakers
Pedals
Amp Parts
Cabinets
AccessoriesNational / 6414-NATIONAL GOLDLINE CUSTOMER SPECIAL REQUEST 175 VA MATCHED PAIR
Click on image(s) above to view larger
BACK
All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by the UK only.
Special Matched Pair
Special Test Request 175 VA
Requested for higher gain
This 6414 was made and tested by Raytheon USA for National Electronics as part of their premium selected Gold line range. This is high grade valve was selected for computer circuits and was used extensively by IBM and the American Military.
The 6414 was only made in the USA and has a 10,000 hour heater rating. The 6414 Raytheon was selected as the factory of choice by National Electronics USA as It is a more ruggedly built, offers long life rating and is made to full military specifications. National Electronics then after a burn in process selected the valves and then marketed them as their premium Gold line range in Gold boxes.
These were tested as a special customer request item as the customer wanted these to be tested with a reduced anode voltage of 175 and not the regular 200 Volts.
At 200 volts, The test plate current is 8 m/A and gain is 5.5 m/Ava. This customer wanted each triode section to be higher than this at a reduced voltage so he would get the items with the higher gain. The customer was manufacturing a Pultec style EQP-1A Equalizer as higher gain was better.
We offer these in Specially Selected Balanced triode sections for higher gain by using a reduced anode voltage of 175 VA in matched pairs as a special customer request
They also have passed the following tests:
Gain (m/A)
Transconductance (mA/V)
Output Drive Tested
Noise 1 (signal to noise)
Noise 2 (Aural)
Microphonics Test 1(Ambient)
Microphonic Test 2 (Shock)
Cathode Test
Grid Leakage Test
The valves come in the original National Gold line box with the 6414 made in the USA printed on the glass in matched pairs.
Very limited stock on these
All prices contained on this page are exclusive of VAT. This is currently charged at 20% and is payable by the UK only.
Special Matched Pair
Special Test Request 175 VA
Requested for higher gain
This 6414 was made and tested by Raytheon USA for National Electronics as part of their premium selected Gold line range. This is high grade valve was selected for computer circuits and was used extensively by IBM and the American Military.
The 6414 was only made in the USA and has a 10,000 hour heater rating. The 6414 Raytheon was selected as the factory of choice by National Electronics USA as It is a more ruggedly built, offers long life rating and is made to full military specifications. National Electronics then after a burn in process selected the valves and then marketed them as their premium Gold line range in Gold boxes.
These were tested as a special customer request item as the customer wanted these to be tested with a reduced anode voltage of 175 and not the regular 200 Volts.
At 200 volts, The test plate current is 8 m/A and gain is 5.5 m/Ava. This customer wanted each triode section to be higher than this at a reduced voltage so he would get the items with the higher gain. The customer was manufacturing a Pultec style EQP-1A Equalizer as higher gain was better.
We offer these in Specially Selected Balanced triode sections for higher gain by using a reduced anode voltage of 175 VA in matched pairs as a special customer request
They also have passed the following tests:
Gain (m/A)
Transconductance (mA/V)
Output Drive Tested
Noise 1 (signal to noise)
Noise 2 (Aural)
Microphonics Test 1(Ambient)
Microphonic Test 2 (Shock)
Cathode Test
Grid Leakage Test
The valves come in the original National Gold line box with the 6414 made in the USA printed on the glass in matched pairs.
Very limited stock on these
Comments
Specials
-
EL34/EL34B STR-TAD SPECIAL OFFER
Special Offer 15% Discount
The TAD EL34B STR has been around for many years now and this valve has a number of ...
£22.00£18.70 -
EL84-SOVTEK
Special Offer 20% Discount Limited Stock
The Sovtek EL84 has been the industry standard go to EL84 for over 25 ...
£24.00£19.20 -
GZ34/5AR4-SOVTEK
Special Offer 15% Discount
The Sovtek GZ34 5AR4 a very well made modern full wave rectifier. The valve uses ...
£32.00£27.20 -
211-PSVANE CLASSIC SERIES
Special Offer 15% Discount<>br>
Psvane 211 Classic Series is a directly heated audio power triode for High end Audio ...
£115.00£97.75 - EF86-HARMA RETRO£
26.00£23.40 - Bugera 6262 Infinium£
254.00£228.60 - Way Huge WM22 Smalls£
132.50£119.25
Tweet