Hi Bob, >From the RFT databook och cold cathode tubes I got the information that GR43 is equivalent to GR44, Z70U, Z70W, Z660W and ER33 - possibly with some small changes in component values, but in most cases you can use any of them as a replacement for the other. The ER32 is equivalent to Z70U, ZC1010 and Z661W with possibly the same changes as with the GR43 when it comes to component values. All of these tubes are interchangeable in some form, the limit is usually how much current they can handle in the anode circuit. RFT only made 5-pin versions of their Z660W and Z661W , when they used them to replace the Z70U they just tied the two trigger electrodes together - with the two trigger electrodes used separately they work as the Z70W. According to the datasheet the GR44 is just a later model of the GR43 and works as a replacement without cirucit changes. /Martin
On Sunday, June 16, 2013 1:24:24 PM UTC+2, bob harper wrote: > doing research on this jukebox pcb....a couple of questions please..the > GR43's the equivalent has been suggested as Z700U by jan wuesten [german > supplier i get obsolete stuff from] but looking at the specs for both > on[franks electron tube page] there appears to me to differences in the > specs....i am not experienced enough in these devises to know if they will > work! > next the ER32 and EA33....the ER33 has actually a GR44 installed in its > place [looks original] this a twin start 5 wire device, the specs on franks > page...but the ER32 which has been desoldered and removed, i cannot find > any info on...its another 5 wire device. > the other tubes i have found o.k and can get replacements, any > advice/suggestions on the above gratefully received! thanks, bob > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/3fc97797-b137-4b1d-9099-9e9608ab46c3%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
