i just bougt this amp at HRO and hooked it up and as soon as i turned it on i hear pulses in my receive. i turnd the amp off and its quiet again so i disconnected all the cables and tuned on my portable radio shack am fm radio to a am dead station and put it near the amp and i can hear the pulses,, any one have this problem? the amp is grounded and i tryed without ground..
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NEW al-811hd making popping sounds in my radio
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RatsoW8
Supporting Member, W9WDX ARC Member - WD8T
RatsoW8
Supporting Member, W9WDX ARC Member - WD8T
Since you just bought it from HRO I'd check their return policy or send the amp to Ameritron for warranty repair. I've owned three of the AL-811 amps and none of them had that issue.
Are you running a keyer for the relay?? With that radio, you'll need to run some sort of keyer. I use the ARB-704. Works great!!
RatsoW8
Supporting Member, W9WDX ARC Member - WD8T
The ARB-704 was designed to lower the keying voltages of old amps like the Heathkit SB-200, etc so not to burn up new radios with low keying voltages. Not needed with an Ameritron- 811 A.
i do run a arm-704 but the problem is its there if the radio is hooked up or not there is some kind of ossilation or a circuit collapsing every second. the tuned input board . scince i just bought it im hoping hro will extange it out. some of the soldering work in this looks like it was done by a rookie. but i dont want to fuss with it,
Call HRO, It would be a shame to have to pay the shipping back to them even though it is defective from the start. Maybe they will not make you pay shipping I don't know.I would be pissed if It was me and had to pay shipping on defective amp.
You can also call Ameritron and talk to a tech, maybe get it straightened out over the phone.
AP
You can also call Ameritron and talk to a tech, maybe get it straightened out over the phone.
AP
RatsoW8
Supporting Member, W9WDX ARC Member - WD8T
RatsoW8
Supporting Member, W9WDX ARC Member - WD8T
As would I, but I would be divorced as well.
I am divorced and when I buy new gear my little dog always approves!!
Sweet! It's a great amp! The secret to keeping it running like new is to tune it exactly like the manual says to EVERY TIME. Those 811 tubes should last forever. Don't let anyone convince you to drop in a set of 572B's either. It's a waste of money.
W8JI designed that amp for Ameritron and his webpage is an excellet recource for the 811.
Amplifiers and Vacuum Tubes Tuning Loading and Arcing
The al-811hd version i have has the four 572B's i heard they dont run to full potential and last longer.. is this correct?
I found a link to the olny one that had the same problem i did. last post on bottom of page.
http://forums.qrz.com/showthread.ph...es-Causing-Issues-In-Ameritron-AL-811HD/page5
I found a link to the olny one that had the same problem i did. last post on bottom of page.
http://forums.qrz.com/showthread.ph...es-Causing-Issues-In-Ameritron-AL-811HD/page5
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So what your saying is I don't need the keyer? How does an FT-897 key the AL-811H? Will RF alone key amp? Please let me know! I would love to free up my CAT port.
Thank you!!