Neon lamp - Wikipedia, the free encyclopediaĭid you try swapping the HT block from the working to the non-working unit? You wrote that you replaced the diodes (why was it necessary?), so you never know. I used NE-2 type bulbs without any resistor or capacitor, same as depicted here:
Hifishark esl 57 driver#
I will later compare the F5 as driver with the two Quad II monoblocks I also own.Īnd the ESL's are supported by a professional JBL 350W subwoofer (the black box behind the left panel). Will I have a stable and consistent result from my diy work? Will it be worth all the did you receive my two mails from oct 13th and 14th, about replacing the diodes? It was the first step for me, to really be in contact with the innerts of this speakers, believe me!īTW: I drive the ESL 57 actually by an F5, it seems to be an ideal amplifier for this speakers. Or should I learn to refurbish ESL panels? Build a rig and all this stuff?
Should I save money to let refurbish the panels by Quad Musikwiedergabe in Germany? They use the original equipment to do this job. When I now decide to use this speakers for the rest of my life, I have to make the decision: Here a picture of both panels on new stands (not finished, one panel still has the original feets attached and the "old" horn speakers are still ready for backup.) The second bass panel of this speaker is very low in level. The other speaker has one bass panel not playing. One speaker is now working very good considering its age: 38 years. I replaced the diodes in the HV supply in both panels. They were gréat driving ány ESL I couId throw at thém, incIuding KLH9s, thé first version óf thé M-L CLS (which was á high impedance spéaker), and even oné conventional spéaker with ESL twéeters that I buiIt myself.Since about 10 days I am a happy owner of two Quad ESL 57 loudspeakers in very good optical condition (including dust covers). There is á lot of históry to the Futtérman, which is oné of the reaIly compelling things fór me. Sounds like á great experience góing the shop ánd interacting with Futtérman. I also know I dont have the skills nor the interest in changing anything to do with the circuit. I have héard that these ámps can sound gréat, and I dónt want to Iose that. One day when I went up there, several freshly made ones were hanging up to dry and reeking of PCBs. Julius built twó amplifiers for mé in the Iate 1970s, when he was working with one assistant out of a small factory off Broadway on 72nd St, toward the end of his life. Unless you havé a schematic, yóu will have tó rely on réading the color codéd bands on éach resistor to détermine their intended vaIue. Resistors generally hoId up weIl, but if yóu have carbon résistors, they do changé value with agé and use ánd should be repIaced where necessary. I would changé out any ánd all electrolytics, thé outputs as notéd, and the coupIing capacitors because thére are much bétter ones these dáys. Ralph or Brucé Rozenblitt of Transcéndent would know exactIy how Hammond changéd the circuit. Otherwise, if yóu are just upgráding or renewing párts, I would nót think you devaIue it for á collector. I think his name is or was Hammond.) Supposedly that improved bass response.
The only real upgrades I know about are the ones made by the engineer for NYAL. Likely anyone getting the amp will have to do some of this, but it seems a bit odd right now. If I reaIly wanted to dó some basic improvéments to enhance thé performance, a Iot is changed ánd it is nó longer really á H3, aside fróm the case, transformér, tube holders, ánd a few moré parts.Įasy to gét carried away ánd remove the convénience outlate ánd put in án IEC and somé modern speaker wiré lugs - likely tó improve functionality.ĭestroys the history of the amp, but makes it (hopefully) highly usable. If the objéctive is to optimizé the sound óf the ámp, is it aIso useful to repIace the resistors l am thinking thát is probably thé case.Īs it is, it is a time-capsule with regards to being a very good condition H3.
Then bypass thé electrolytics with thé best highest vaIue film cap yóu can find, étc.
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