Nov 15, 2006 · The 1k resistor that attaches to the output sees a fairly constant 10V across its leads, which means that 10mA flows through it and, roughly, through the two 14.5k resistors, which helps set the fixed output voltage. AC POWER SUPPLY - Bill's Antique RadiosWinding L-18 is the high-voltage winding and is center-tapped for use in a full-wave rectifier circuit. Filament voltages will vary depending on what type tubes are used in a receiver. The voltage of the high-voltage secondary is applied to the plates of the 5Y3 rectifier tube.
Output power tubes are characterized by high power sensitivity; that is, a low signal input voltage gives a high power output. As stated earlier, the 6V6 gives a 4.25 watt output for a 12.5 volt input signal, by contrast, the much older type 45 power amplifier tetrode will only give an output of 1.6 watts for an input signal of 50 volts. Antique Radio Classified--Restoration Topics dec 04 cantelonNov 27, 2004 · If you are new to restoring antique tube radios, here are some useful capacitor tips. (alternating current) power from the DC (direct current) voltage that your radio tubes need to operate. · Sizewise, the electrolytics are the largest capacitors. the two ends of the capacitor in question with a high wattage 1,000-ohm resistor, using Antique Radio Forums View topic - How to Test Capacitors Post subject:How to Test Capacitors & Resistors. Posted:Jul Thu 30, 2020 12:07 am . Member:Joined:Jul Fri 10, 2020 11:10 pm Posts:268 I was told I needed at least one good meter so I have a Fluke 117 and a radio shack meter. How am I to check all capacitors and resistors with the above equipment to see if they are good or bad?
Capacitors and Resistors for Tube Electronics - JustRadios Capacitor uF - nF - pF Conversion Chart High Voltage Electrolytic Capacitors - Axial Leads Silver MICA Capacitors - 500 Volts & 1000 Volts. Resistor KITS - for vintage tube radios & tube based electronics Vintage Tube Radio Dial Belts DIY HIGH VOLTAGE MULTIMETER PROBE :8 Steps (with insulate it by wrapping the resistors with 4 layer of heat shrink tubing we can expect at least 2.4kv insulation from those,because each tubing was rated for 600v . begin by wrapping all the 1MOhm resistor,leave the 10k resistor (pic 3) the heat shrink tubing size:2 layer of 5mm tubes and 2 layer of 6mm tubes Design of Ham Vacuum Tube TransmittersThis much better for voltage stability, and it produces less heat, than the common method of creating low voltage supplies through large dropping resistors from the full high voltage. fig 2 This supply, with an appropriate size 500 Vrms center tapped transformer, would make a pretty good 700V / 350V transmitter supply for 6146's, 807's, and
100 MegOhm 15kV 2W High Voltage Resistor < click for info > $8.95 HIGH VOLTAGE RESISTOR 3,5kV 0,5W 4,7Mohm - PARTCO Juurakkotie 5B, 01510 Vantaa; Open hours Mon-Fri 08:00-17:00; You can buy on-place or online for 24/7 pickup JustRadios -- Capacitors and Resistors - Antique RadiosJustRadios Capacitors and Resistors:Specializes in high voltage capacitors and resistors for vintage tube radios. Capacitor types carried include polypropylene film, polyester film, polystyrene film, silver mica, ceramic disc, safety, non-polar electrolytic and polar electrolytic up to 600V.
Oct 16, 2015 · I brought this up in the vacuum tube function generator thread as a concern when replacing resistors in old vacuum tube gear. This came up for me when I was rehabilitating a high power linear amplifier for amateur radio use. The metering circuit that was intended ot measure the amplifier's anode DC voltage used three 4.7 megaohm resistors in New high-voltage power supply with tube rectifier - YahooThe PS-Tube kit was designed for those who wish to build a tube-based line stage or phono stageusing a tube-rectifier-based power supply that uses a classic tube-amplifier power transformer that holds a center-tapped high-voltage secondary, a 6.3Vac heater winding, and a 5Vac secondary for the tube rectifier. PS-5 Tube B+ Power Supply KitThe PS-5 kit includes two high-quality 47µF/450V capacitors (C1 & C2) and three 5W power resistors (R3), 300, 1500, and 10k. (The power resistor can be replaced with a choke by leaving R3 off the PCB and soldering the external choke's two leads to R3's solder pads.) Kit includes user guide and four standoffs, with O-rings and screws.
This radio kit will cover the AM radio band along with the SW radio band. Power for this receiver is 1.5 V DC for the filaments and 45V DC for the plate current. A D cell and five 9V transistor batteries wired in series will work to power this radio. A 2000 ohm headset or an audio amplifier is required. Requires two T-1T4_DF91 tubes (not included). Resistors Antique Electronic SupplyCarbon Film resistors are made by vacuum depositing a thin carbon film on a ceramic form. A good choice for applications which require a steady, low power drop. Sold in multiples of 5. ½" watt - 350V working, 700V overload, 0.4" long by 0.14" dia.