HVD1005 Machlett High Voltage Diode Board

Description: Platinum Tubes HVD1005 Machlett High Voltage Diode Board Normal 0 false false false EN-US X-NONE X-NONE Machlett diodes provide the protection necessary in high output microwave systems, and deliver exceptional performance at surprisingly low prices. History of Machlett Diodes The problem: Diodes are being run at a load current higher than they can handle and still maintain the junction temperature within the rating. Heat is generated at the diode junction and must be removed by conduction through the lead wires into the copper track on the PCB. The heat is then radiated into the air by the lead wires and traces. The problem is the board design is such that there is not enough surface area to radiate the heat fast enough so the temperature of the lead wires and traces rises and eventual approaches or exceeds the melting temperature of the solder. The diodes are typically rated for a maximum operating temperature of 150 °C (572 °F) which is above the melting temperature of the 60/40 solder (375 °F) typically used for this type of product. By the time the solder has reflowed the junctions are well beyond the rating for reliable operation and fail. When a diode junction fails it typically shorts which takes it "out of circuit" and reduces the diode count in the string which decrease the voltage hold-off capability of the assembly as well as increasing heating in the remaining working diodes. Once a diode or two have failed the situation becomes critical and a catastrophic failure occurs complete with arcing, smoke, fire, etc. The Machlett Solution: Our new design uses a combination of MUCH larger trace area and diodes with a lower forward voltage drop, lower junction capacitance, and lower leakage current, all of which are heat generators. The effect of our design is a lower operating temperature due to less heat generation within the diode combined with better heat removal. We are also using the newer style SAC305 solder (lead-free) which has a melting temperature of 221 °C. These diodes come with a full manufactures quality warranty. No other diode in the industry has a warranty. Characteristics Machlett diode prices are the best in the industry. 34 kv 4 Amp "Black Stick" style is the most durable in the industry 26-40 kv "Circuit Card" style diodes have the industry's largest copper traces on the board to handle increased current with total reliability Metal-oxide varistors (MOVs) are available on all styles for added durability Precise OEM fit for all systems New diode board assembly upgrades available for any transmitter New Current Production WHY PLATINUM TUBES? Why Penta Laboratories? Deep Expertise: We understand the unique demands of RF heat sealing technology and offer a comprehensive selection of parts for top brands. Quality Assurance: Our replacement RF power oscillator tubes, rotary RF welding parts, RF amplifier components, diodes, and capacitors meet the highest standards for performance and durability. Top Choice for Repairs: Leading RF welding repair experts trust Penta Labs for OEM-equivalent replacement tubes in some of the world's most demanding heat-sealing applications. Competitive Pricing: Transparent, budget-friendly pricing helps you optimize your production costs. Once purchased and received by Platinum Tubes, vacuum tubes undergo exacting quality control measures to further assure reliable, sonically acceptable performance. Each power tube is then tested and graded for technical characteristics specified by platinum tubes engineers. Only after a tube successfully passes these exacting challenges is it labeled and put into stock to be sold. Tubes not meeting these criteria are rejected to the supplier or disposed of. Average tube life will depend on several parameters: product type, how the product is installed, loudspeaker efficiency, room size and acoustic damping, listening habits or average sound pressure levels, A.C. line stability and purity, and other circumstances. Generally, preamplifier tubes last up to 5,000 hours, while power amplifier output tubes will last up to 3,000 hours. Near the end of their useful sonic life, aging vacuum tubes may degrade the sonic character of the product(s) they are used in. The sound may become somewhat dry and lifeless, with a noticeable decrease in harmonic richness or bloom. Bass response may be diminished, and musical dynamics may flatten out or compress. Toward the very end of their service life, tubes may become noisy, noticeable as a slight rushing sound or rustling noise. It is far better to replace vacuum tubes prior to the end of their service life, before severe sonic degradation or outright failure occurs. Running vacuum tubes into failure may damage to other internal components and cause needless repair expense. Factors which can shorten tube life include inadequate ventilation, overdriving loudspeakers at continuously high volume levels, severely fluctuating A.C. line conditions (e.g. sagging line voltage during summer peaks of air-conditioning demand), or severe interference pulses or electromagnetic interference. *In the event of a failure, tube(s) must be sent back to us at the buyer's expense. We will expedite any replacements after testing the tube internally at our expense.

Price: 120 USD

Location: Newbury Park, California

End Time: 2024-08-23T22:11:13.000Z

Shipping Cost: N/A USD