In particular tye GZ34 has a lower heater current than many others of a similar HT rating. It may be OK for that amplifier but not for all! The attached pdf gives a brief overview, but other factors such as series resistance and capacitor loading must also be considered. Antique radios, Old Time Radios. Sovtek; Saratov National Electronics, Inc.
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All our tubes are guaranteed for 3 months from the date of purchase. Any exceptions will be noted on that tube's Warranty tab If you receive a tube that does not perform to the manufacturer's specifications, please do the following: - contact us to get a return authorization - return it via regular mail within 90 days from when we shipped it, and we will provide an exchange or refund of the full purchase price of the tube.
We can not accept returns that don't have an authorization, are past 3 month, or are returned improperly. These guidelines may be updated without notice. I've been reading some negative reviews on other websites, and wanted to say that I've been using this tube in a Leak Stereo 50 amp for over a year, and have not had any problems with it at all. There would be at least hours of use. Admittedly, I don't thrash the amp, or listen at high volume levels, but this tube compares very well to a NOS Mullard which I have also tested.
I'll monitor this one, and update the review if it's warranted. I still really like this tube, and JJ tubes in general. Maybe the earlier tube was from a bad batch?
Will keep you posted. Have been using JJ GZ34 rectifiers for at least 3 re-tubes in my guitar amp. All have served their purposes well and not let me down with the exception of the latest one which was way overdue for replacement 2 years heavy use but that is expected.
Rectifier tubes either work well, or they don't And the JJ does a fine job. It doesn't get to hot, and the amp sounds great The price is very good on this tube, so I'll gladly use them as a standard.
Brian uses the Normal channel exclusively but I also like the '60's jangle of the Brilliant channel. Rectifier - Sovtek. BM Tube life Power Stage — 30 hours max. They lend a little more compression and add sweetness to the tone. They bloom beautifully! I have been using them for about 15 years and I've never had a failure. I'm so satisfied with them that I haven't entertained the idea of using anything else.
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GZ34 RECTIFIER. Datasheet pdf. Equivalent
GE 5AR4 Datasheet