681
The 1T4 is a miniature screened pentode for dry battery operation. It was designed for radio reception and is a variable μ RF device. This valve was purchased new in ...


635
1T4 r.f. pentode is used as a regenerative screen grid detector and a 1S4 as a power output pentode. This arrangement affords quite a healthy wallop in the ...


106
Tube 1T4 or Röhre 1T4 ID429, Vacuum Pentode, Miniatur-7-Pin-Base B7G, USA 1940 and RF/IF-Stage shown. Radio tubes are valves.


768
1/18/2015 · I made some tests with one 1T4 (DF91) regen, some configurations work, some not... However one of my faults in the past was related to the x-tal earpiece.


873
The DF91 is a is a miniature screened pentode for dry battery operation. It was designed for broadcast radio reception and is a variable μ RF device. See also 1T4


365
1/18/2009 · This is a one valve ... One valve radio ... the 1T4. This valve was used extensively in radio equipment during the second world war and was ...


668
This is a two tube regen or regenerative receiver: one 1T4 detector and one 3V4 audio amplifier. All of this is accomplished with two plug in RF coils.


417
Bold designators are close or identical, Italic designators are different ratings, different pinouts or different filament voltages. Please see the substitutes at the ...


555
This, together with the valve, was displayed proudly on the top face of the chassis. The valve was specified as 1T4 or DF91, with ...


55
Tube DF 91 or Röhre DF91 ID434, Vacuum ... DF91 = 1T4 = W17 = 1K2 ... You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a ...


419
The 1T4 is a miniature screened pentode for dry battery operation. It was designed for radio reception and is a variable μ RF device. This valve was purchased new in ...


785
Find great deals on eBay for df91 valve. Shop with confidence.


250
This is my homemade 2- 1t4 tube radio page. The first tube is an rf amplifier, and the second tube is the detector. My little project is based on the looks of the old ...


107
Find great deals on eBay for 1t4 tube and 1u4 tube. Shop with confidence.


813
A site for the novice or established collector/restorer of Vintage Radio sets and Electronics.Valve (tube) and Transistor with information/projects and technical help .


455
This is my homemade shortwave tube shortwave radio page. The 1T4 miniature tube has been the mainstay of the homemade radio builder for over half a century. They are ...


969
Free delivery and returns on eligible orders. Buy TUBE: JAN-1T4 IT4 VT-173 valve RT France at Amazon UK.


432
A pentode is an electronic device having five active electrodes. The term most commonly applies to a three-grid amplifying vacuum tube (thermionic valve), which was ...


420
The HAC model K 1 Valve Receiver. The valve is an 1T4 (DF91) and dates from the late 1940's. The instruction sheet has been cleaned up by me and where required ...


248
Tube/valve DF91 = CV785 = 1T4 Philips. Tube/valve DF91 = CV785 = 1T4 Philips. Email to a Friend. Be the first to review this product. Sign up for price alert.