-502A Amplifier Board Bluetooth 5.1 Digital Audio Amplifier Board 50W+50W J7Z9 Excellent quality: high quality material, safe and durable.Stable performance: with better noise performance, excellent output drive capability and relatively high small signal bandwidth, power supply voltage range.High fidelity: When used as an audio amplifier, the tone is warm and the fidelity is high.Wide range of uses: suitable for high quality and professional audio equipment, instruments, control circuits and telephone channel amplifiers.It has the characteristics of small size, high efficiency, and small heat.[Product Model]-502A[Product name] 2.0 channel 50Wx2 stereo Bluetooth audio power amplifier [Audio input] AUX+Bluetooth+U disk+USB sound card[Bluetooth version]5.1[Audio output] Left channel 50W+Right channel 50W[Adapter power supply] DC9~24V/ greater or equal to 3A (can not be connected to AC)[Adapted speaker] 10-50W, 4-8 ohm[Volume adjustment]Classic mechanical knob (with volume scale) stepless adjustment[Switch machine]Classic mechanical switch, one turn to switch the machine, no need to wait for a long time[Protection mechanism]Overheating, overcurrent, short circuit, anti-static protection[Features]Support Wuzhi Audio APP. Modify and change the bluetooth name, password setting prompt tone volume adjustment, on/off prompt tone, sleep aid song, sound effect selection + custom sound effect, U disk playlist.[Product size]78x50x18mmNote:It is recommended to use an 8 ohm speaker, power supply 9-24V DC, and do not overvoltage.If driving a 4 ohm speaker, the power supply cannot exceed 12V.Colour: blackMaterial: ABSPackage Contents:1 * Audio Amplifier Board Module1 * Screwdriver1 * Terminal

-502A Amplifier Board Bluetooth 5.1 Digital Audio Amplifier Board 50W+50W O7L5 Excellent quality: high quality material, safe and durable.Stable performance: with better noise performance, excellent output drive capability and relatively high small signal bandwidth, power supply voltage range.High fidelity: When used as an audio amplifier, the tone is warm and the fidelity is high.Wide range of uses: suitable for high quality and professional audio equipment, instruments, control circuits and telephone channel amplifiers.It has the characteristics of small size, high efficiency, and small heat.[Product Model]-502A[Product name] 2.0 channel 50Wx2 stereo Bluetooth audio power amplifier [Audio input] AUX+Bluetooth+U disk+USB sound card[Bluetooth version]5.1[Audio output] Left channel 50W+Right channel 50W[Adapter power supply] DC9~24V/ greater or equal to 3A (can not be connected to AC)[Adapted speaker] 10-50W, 4-8 ohm[Volume adjustment]Classic mechanical knob (with volume scale) stepless adjustment[Switch machine]Classic mechanical switch, one turn to switch the machine, no need to wait for a long time[Protection mechanism]Overheating, overcurrent, short circuit, anti-static protection[Features]Support Wuzhi Audio APP. Modify and change the bluetooth name, password setting prompt tone volume adjustment, on/off prompt tone, sleep aid song, sound effect selection + custom sound effect, U disk playlist.[Product size]78x50x18mmNote:It is recommended to use an 8 ohm speaker, power supply 9-24V DC, and do not overvoltage.If driving a 4 ohm speaker, the power supply cannot exceed 12V.Colour: blackMaterial: ABSPackage Contents:1 * Audio Amplifier Board Module1 * Screwdriver1 * Terminal

-502A Amplifier Board Bluetooth 5.1 Digital Audio Amplifier Board 50W+50W P6J2 Excellent quality: high quality material, safe and durable.Stable performance: with better noise performance, excellent output drive capability and relatively high small signal bandwidth, power supply voltage range.High fidelity: When used as an audio amplifier, the tone is warm and the fidelity is high.Wide range of uses: suitable for high quality and professional audio equipment, instruments, control circuits and telephone channel amplifiers.It has the characteristics of small size, high efficiency, and small heat.[Product Model]-502A[Product name] 2.0 channel 50Wx2 stereo Bluetooth audio power amplifier [Audio input] AUX+Bluetooth+U disk+USB sound card[Bluetooth version]5.1[Audio output] Left channel 50W+Right channel 50W[Adapter power supply] DC9~24V/ greater or equal to 3A (can not be connected to AC)[Adapted speaker] 10-50W, 4-8 ohm[Volume adjustment]Classic mechanical knob (with volume scale) stepless adjustment[Switch machine]Classic mechanical switch, one turn to switch the machine, no need to wait for a long time[Protection mechanism]Overheating, overcurrent, short circuit, anti-static protection[Features]Support Wuzhi Audio APP. Modify and change the bluetooth name, password setting prompt tone volume adjustment, on/off prompt tone, sleep aid song, sound effect selection + custom sound effect, U disk playlist.[Product size]78x50x18mmNote:It is recommended to use an 8 ohm speaker, power supply 9-24V DC, and do not overvoltage.If driving a 4 ohm speaker, the power supply cannot exceed 12V.Colour: blackMaterial: ABSPackage Contents:1 * Audio Amplifier Board Module1 * Screwdriver1 * Terminal

Tektronix TM504 main frame + SC 503 oscilloscopio dua canali banda passante 10 MHZ + DC 505A universal/counter timer + DM 502A autoranging DDM.Prova effettuata: Lo strumento si accende, risponde ai comandi del frontale. E stato applicato un segnale RF in entrambi i canali delloscilloscopio e si è visualizzata la forma donda. Al cassetto frequenzimetro è stato applicato un segnale RF e lo strumento ha effettuato la misura. Il commutatore del GATE TIME presenta falsi contatti, necessita revisione. Il multimetro è funzionante. Alimentazione 230 vac.Strumento venduto allasta nelle condizioni in cui si trova, non testato in tutte le sue funzioni salvo se specificato diversamente sopra; per fare lofferta basatevi esclusivamente sulla prova da noi effettuata, a fronte di ciò non si accettano contestazioni post-vendita. Ask for international shipping, we need of zip code. Visitate il nostro negozio ebaY: ELECTRONIC SURPLUS COMPONENTS <<<< our ebaY store

We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

-502A VerstäRkerplatine Bluetooth 5.1 Digital Audio VerstäRkerplatine 50 K5J4 Hervorragende Qualität: Hochwertiges Material, sicher und langlebig. Leistung: mit besserem Rauschverhalten, hervorragender Ausgangstreiberfähigkeit und relativ hoher Kleinsignalbandbreite, großem Versorgungsspannungsbereich.High Fidelity: Bei Verwendung als Audioverstärker ist der Ton warm und die Wiedergabetreue .Breites Einsatzspektrum: geeignet für hochwertige und professionelle Audiogeräte, Instrumente, Steuerschaltungen und Telefonkanalverstärker.Es hat die Eigenschaften kleiner Größe, hoher Effizienz, hoher Leistung und geringer Wärmeentwicklung.[Produktmodell]-502A.[Produktname] 2.0-Kanal-50Wx2-Stereo-Bluetooth-Audio-Leistungsverstärker [Audioeingang] AUX+Bluetooth+U-Disk+USB-Soundkarte.[Bluetooth-Version]5.1.[Audioausgang] Linker Kanal 50 W + Rechter Kanal 50 W[Netzteil des Adapters] DC9~24 V/ größer oder gleich 3 A (kann nicht angeschlossen werden zu AC)[Angepasster Lautsprecher] 10-50W, 4-8 Ohm[Lautstärkeeinstellung]Klassischer mechanischer Knopf (mit Lautstärkeskala) stufenlose Einstellung[Schaltermaschine]Klassischer mechanischer Schalter, eins drehen, um die einzuschalten, keine Notwendigkeit, lange zu warten[Schutzmechanismus]Überhitzung, Überstrom, Kurzschluss, Antistatikschutz[Eigenschaften]Unterstützt Wuzhi Audio APP. Ändern und ändern Sie den Bluetooth-Namen, die Lautstärkeeinstellung des Aufforderungstons zur Kennworteinstellung, den Ein-/Aus-Aufforderungston, den Schlafhilfe-Song, die Soundeffektauswahl + benutzerdefinierter Soundeffekt, die U-Disk-Wiedergabeliste.[Produktgröße] 78 x 50 x 18 mmHinweis:Es wird empfohlen, einen 8-Ohm-Lautsprecher zu verwenden, die Stromversorgung 9-24 V DC und keine Überspannung zu erzeugen.Wenn ein 4-Ohm-Lautsprecher betrieben wird, darf die Stromversorgung 12 V nicht überschreiten.Farbe: Schwarz

-502A VerstäRkerplatine Bluetooth 5.1 Digital Audio VerstäRkerplatine 50 W7V1 Hervorragende Qualität: Hochwertiges Material, sicher und langlebig. Leistung: mit besserem Rauschverhalten, hervorragender Ausgangstreiberfähigkeit und relativ hoher Kleinsignalbandbreite, großem Versorgungsspannungsbereich.High Fidelity: Bei Verwendung als Audioverstärker ist der Ton warm und die Wiedergabetreue .Breites Einsatzspektrum: geeignet für hochwertige und professionelle Audiogeräte, Instrumente, Steuerschaltungen und Telefonkanalverstärker.Es hat die Eigenschaften kleiner Größe, hoher Effizienz, hoher Leistung und geringer Wärmeentwicklung.[Produktmodell]-502A.[Produktname] 2.0-Kanal-50Wx2-Stereo-Bluetooth-Audio-Leistungsverstärker [Audioeingang] AUX+Bluetooth+U-Disk+USB-Soundkarte.[Bluetooth-Version]5.1.[Audioausgang] Linker Kanal 50 W + Rechter Kanal 50 W[Netzteil des Adapters] DC9~24 V/ größer oder gleich 3 A (kann nicht angeschlossen werden zu AC)[Angepasster Lautsprecher] 10-50W, 4-8 Ohm[Lautstärkeeinstellung]Klassischer mechanischer Knopf (mit Lautstärkeskala) stufenlose Einstellung[Schaltermaschine]Klassischer mechanischer Schalter, eins drehen, um die einzuschalten, keine Notwendigkeit, lange zu warten[Schutzmechanismus]Überhitzung, Überstrom, Kurzschluss, Antistatikschutz[Eigenschaften]Unterstützt Wuzhi Audio APP. Ändern und ändern Sie den Bluetooth-Namen, die Lautstärkeeinstellung des Aufforderungstons zur Kennworteinstellung, den Ein-/Aus-Aufforderungston, den Schlafhilfe-Song, die Soundeffektauswahl + benutzerdefinierter Soundeffekt, die U-Disk-Wiedergabeliste.[Produktgröße] 78 x 50 x 18 mmHinweis:Es wird empfohlen, einen 8-Ohm-Lautsprecher zu verwenden, die Stromversorgung 9-24 V DC und keine Überspannung zu erzeugen.Wenn ein 4-Ohm-Lautsprecher betrieben wird, darf die Stromversorgung 12 V nicht überschreiten.Farbe: Schwarz

-502A VerstäRkerplatine Bluetooth 5.1 Digital Audio VerstäRkerplatine 50 Z2U2 Hervorragende Qualität: Hochwertiges Material, sicher und langlebig. Leistung: mit besserem Rauschverhalten, hervorragender Ausgangstreiberfähigkeit und relativ hoher Kleinsignalbandbreite, großem Versorgungsspannungsbereich.High Fidelity: Bei Verwendung als Audioverstärker ist der Ton warm und die Wiedergabetreue .Breites Einsatzspektrum: geeignet für hochwertige und professionelle Audiogeräte, Instrumente, Steuerschaltungen und Telefonkanalverstärker.Es hat die Eigenschaften kleiner Größe, hoher Effizienz, hoher Leistung und geringer Wärmeentwicklung.[Produktmodell]-502A.[Produktname] 2.0-Kanal-50Wx2-Stereo-Bluetooth-Audio-Leistungsverstärker [Audioeingang] AUX+Bluetooth+U-Disk+USB-Soundkarte.[Bluetooth-Version]5.1.[Audioausgang] Linker Kanal 50 W + Rechter Kanal 50 W[Netzteil des Adapters] DC9~24 V/ größer oder gleich 3 A (kann nicht angeschlossen werden zu AC)[Angepasster Lautsprecher] 10-50W, 4-8 Ohm[Lautstärkeeinstellung]Klassischer mechanischer Knopf (mit Lautstärkeskala) stufenlose Einstellung[Schaltermaschine]Klassischer mechanischer Schalter, eins drehen, um die einzuschalten, keine Notwendigkeit, lange zu warten[Schutzmechanismus]Überhitzung, Überstrom, Kurzschluss, Antistatikschutz[Eigenschaften]Unterstützt Wuzhi Audio APP. Ändern und ändern Sie den Bluetooth-Namen, die Lautstärkeeinstellung des Aufforderungstons zur Kennworteinstellung, den Ein-/Aus-Aufforderungston, den Schlafhilfe-Song, die Soundeffektauswahl + benutzerdefinierter Soundeffekt, die U-Disk-Wiedergabeliste.[Produktgröße] 78 x 50 x 18 mmHinweis:Es wird empfohlen, einen 8-Ohm-Lautsprecher zu verwenden, die Stromversorgung 9-24 V DC und keine Überspannung zu erzeugen.Wenn ein 4-Ohm-Lautsprecher betrieben wird, darf die Stromversorgung 12 V nicht überschreiten.Farbe: Schwarz

Bose Panaray 502A Speakers Pair.

-502A Bluetooth 5.1 DC9-24V Audio Digital Amplifier Board Module 2.1 C8V3 Model Name: -502AProduct Name: 50W x 2 Bluetooth audio amplifier moduleAudio Input: AUX+ Bluetooth+U disk + USB sound cardChannel: 2.0 (stereo)Power Range: DC9-24V/4A above ( recommended high voltage)Adapter Speaker: 10W-50W, 4-8 ohmProtection Mechanism: overvoltage, undervoltage, overheating, DC detection, short circuit protectionPS: In the audio input is enough, the supply voltage/current is enough, there will be enough output power! The higher the supply voltage, the greater the output power. The smaller the impedance of the speaker, the greater the output power! Please that the power of the adaptor is the actual working power of the amplifierType: Subwoofer Amplifier Boardcolor:BlackMaterial:plasticsize:78 x 50 x 18mmPackage Contents:1 x -502A Bluetooth Audio Digital Power Amplifier Board Module

Item is one unmatched lot of GE and RCA 502A vacuum tubes. These tubes are used and have dust, shadowing or label discoloration that appear with extended use. These tubes have not been tested. My vacuum tube tester does not support this type of tube. All tested tubes are at least GOOD on my Superior Instrument tube tester (most 7, 8 or 9 pin tubes) or meet the minimum strength on my U-Test-Em drug store tester (most other tubes). If a tube is labelled as untested, it is because I do not have the necesssary equipment to test it. All tubes that dont meet your expectations can be returned regardless of their test status. Sets of vacuum tubes labelled as pairs, quartets, sets, etc, came to me grouped together or labelled as such. My tube testers are not sophisticated enough to guarantee that all sets of tubes are fully matched correctly. Again, if you are unsatisfied with the tubes you receive, you can send them back for a refund. --> All items are inspected to ensure that they ship in working order ready to use. Any damage or wear outside of that which comes from normal usage is noted above in the description. Photos are of the actual item for sale, or if more than one is available, representative of any of them. Save on Shipping!!! Single items ship to anywhere in the USA at the shipping price listed. If you buy more than one item in the same order, the additional items will ship for free. For buyers in the United States, this discount is calculated automatically when you pay. Buyers in other countries should contact me for a shipping quote. Items will ship either USPS first class or Priority Mail at my discretion. So, please check out the other items I have for sale to save on shipping. I pack and ship the items usually within one to three days after payment is received, so please do not complete checkout until you have everything you need so the shipping discount can be applied properly and all items can be shipped together. Shipping To Other Countries We now ship to many countries worldwide! Shipping charges will vary by country as well as by the number, size and weight of the items won. If you are outside the United States, please contact me before buying to get shipping rates as the postage varies from country to country and I cannot list them all here. Tariffs, duties, and other charges are your responsibility and are not included in the shipping charges. We accept Paypal only for foreign orders. K4 Item #EL-0806

-502A VerstäRkerplatine Bluetooth 5.1 Digital Audio VerstäRkerplatine 50 C8N3 Hervorragende Qualität: Hochwertiges Material, sicher und langlebig. Leistung: mit besserem Rauschverhalten, hervorragender Ausgangstreiberfähigkeit und relativ hoher Kleinsignalbandbreite, großem Versorgungsspannungsbereich.High Fidelity: Bei Verwendung als Audioverstärker ist der Ton warm und die Wiedergabetreue .Breites Einsatzspektrum: geeignet für hochwertige und professionelle Audiogeräte, Instrumente, Steuerschaltungen und Telefonkanalverstärker.Es hat die Eigenschaften kleiner Größe, hoher Effizienz, hoher Leistung und geringer Wärmeentwicklung.[Produktmodell]-502A.[Produktname] 2.0-Kanal-50Wx2-Stereo-Bluetooth-Audio-Leistungsverstärker [Audioeingang] AUX+Bluetooth+U-Disk+USB-Soundkarte.[Bluetooth-Version]5.1.[Audioausgang] Linker Kanal 50 W + Rechter Kanal 50 W[Netzteil des Adapters] DC9~24 V/ größer oder gleich 3 A (kann nicht angeschlossen werden zu AC)[Angepasster Lautsprecher] 10-50W, 4-8 Ohm[Lautstärkeeinstellung]Klassischer mechanischer Knopf (mit Lautstärkeskala) stufenlose Einstellung[Schaltermaschine]Klassischer mechanischer Schalter, eins drehen, um die einzuschalten, keine Notwendigkeit, lange zu warten[Schutzmechanismus]Überhitzung, Überstrom, Kurzschluss, Antistatikschutz[Eigenschaften]Unterstützt Wuzhi Audio APP. Ändern und ändern Sie den Bluetooth-Namen, die Lautstärkeeinstellung des Aufforderungstons zur Kennworteinstellung, den Ein-/Aus-Aufforderungston, den Schlafhilfe-Song, die Soundeffektauswahl + benutzerdefinierter Soundeffekt, die U-Disk-Wiedergabeliste.[Produktgröße] 78 x 50 x 18 mmHinweis:Es wird empfohlen, einen 8-Ohm-Lautsprecher zu verwenden, die Stromversorgung 9-24 V DC und keine Überspannung zu erzeugen.Wenn ein 4-Ohm-Lautsprecher betrieben wird, darf die Stromversorgung 12 V nicht überschreiten.Farbe: Schwarz

We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

ONE   NOS RCA Black Metal 502A Silver Print Vacuum Tube   No Box     Guaranteed THREE AVAILABLE ALL NEW Listing and template services provided by inkFrog

Bose Panaray 502A Speakers Pair,cosmetical damage.

Bose Panaray 502A Speakers Pair.

We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

THIS AUCTION IS FOR ONE CAPACITORS !!! They are were removed from a TEKTRONIX 502a  that looked like it had never been used.   They are from the late 1960s.   Value is 1.5 uf 236 VAC  experts will tell you that there is no scientific explanation of why paper in oil capacitors will give you better Tone when used in a guitar circuit. But it is a well known fact in the guitar community that paper in oil will be warmer, smoother and have more Sparkle than ceramic disc, mylar or polypropylene capacitors. The original Bumble Bees, Cornell Dubillier, and Black Beauties were paper in oil and thought of by many to be the Holy Grail of Tone as far as capacitors go. Paper in oil (or PIO) caps are just one variety of capacitor. Others are made out of mylar, ceramic, etc. PIO caps were used in the Les Pauls of the 50s and many appreciate their tonal qualities over more modern capacitors. Listing and template services provided by inkFrog

We have tons of these flats loaded with tubes! Weve opened many boxes to make sure tubes matched the boxes. Out of all the boxes opened, most matched but several had the correct number tube though different brand from the box. SOLD AS IS. Welcome to Vacuum Tube Depot! We have been one of the leading online suppliers of vacuum tubes for many years. Recently, we acquired a very large collection of tubes that we are excited to offer. We have tested and sold thousands of these tubes, and have many, many more to sell. After testing literally thousands of tubes from this collection, we have found only a small handful that did not test well. The vast majority tested strong. Buy with confidence, and if you are not happy with your purchase, you can send it back on your dime for a refund. We will combine shipping on multiple purchases within 5 days of the first auction ending. Payment must be made within 5 days or your purchase will be canceled and re-listed. We do not have the space to hold onto auctions for you for any longer than this. If you would like combined shipping, please wait to make payment until after we have sent your invoice. We send invoices each day after all auctions have ended for that day. Thank you for shopping with Vacuum Tube Depot!

Bose Panaray 502A Speakers Pair,cosmetical damage.

Bose Panaray 502A Speakers Pair.