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Hi all, Just an update, we got the fan job done in my friends AL-80B amp. All is well.
I never noticed that the neither?of the meter lights work. The amp is already? put in it's place so it is a small "project" to get it out. Anyway, the schematic?that I found on line does not show the meter lights and unless I missed it, it doesn't list lights on the parts list either.
Does anyone know where the meter light voltage is picked up from and what is the bulb/lamp voltage?
If I can get this information ahead of time, I can get some LED's ready so we can pull out the amp, install the LED's and back together again.
Thanks and 73, Bob? W4JFA
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Bob, the meter lamps are on the top of each meter. ?It’s a plastic removable plate (small) that lifts out with the bulb. ?The bulb runs off the control circuitry voltage. ?Lou
On Tuesday, January 9, 2024, 10:11 AM, Bob <W4JFABob@...> wrote: Hi all, Just an update, we got the fan job done in my friends AL-80B amp. All is well.
I never noticed that the neither?of the meter lights work. The amp is already? put in it's place so it is a small "project" to get it out. Anyway, the schematic?that I found on line does not show the meter lights and unless I missed it, it doesn't list lights on the parts list either.
Does anyone know where the meter light voltage is picked up from and what is the bulb/lamp voltage?
If I can get this information ahead of time, I can get some LED's ready so we can pull out the amp, install the LED's and back together again.
Thanks and 73, Bob? W4JFA
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Lou, 12 volts? Thanks Bob? W4JFA
On Tue, Jan 9, 2024 at 10:42?AM Louis Parascondola via <Gudguyham= [email protected]> wrote:
Bob, the meter lamps are on the top of each meter.? It’s a plastic removable plate (small) that lifts out with the bulb.? The bulb runs off the control circuitry voltage.? Lou
On Tuesday, January 9, 2024, 10:11 AM, Bob <W4JFABob@...> wrote: Hi all, Just an update, we got the fan job done in my friends AL-80B amp. All is well.
I never noticed that the neither?of the meter lights work. The amp is already? put in it's place so it is a small "project" to get it out. Anyway, the schematic?that I found on line does not show the meter lights and unless I missed it, it doesn't list lights on the parts list either.
Does anyone know where the meter light voltage is picked up from and what is the bulb/lamp voltage?
If I can get this information ahead of time, I can get some LED's ready so we can pull out the amp, install the LED's and back together again.
Thanks and 73, Bob? W4JFA
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Lou, I see 12 volts supply to the meter board?but even that diagram I have does not show the lamps. Bob
Lou, 12 volts? Thanks Bob? W4JFA
On Tue, Jan 9, 2024 at 10:42?AM Louis Parascondola via <Gudguyham= [email protected]> wrote:
Bob, the meter lamps are on the top of each meter.? It’s a plastic removable plate (small) that lifts out with the bulb.? The bulb runs off the control circuitry voltage.? Lou
On Tuesday, January 9, 2024, 10:11 AM, Bob <W4JFABob@...> wrote: Hi all, Just an update, we got the fan job done in my friends AL-80B amp. All is well.
I never noticed that the neither?of the meter lights work. The amp is already? put in it's place so it is a small "project" to get it out. Anyway, the schematic?that I found on line does not show the meter lights and unless I missed it, it doesn't list lights on the parts list either.
Does anyone know where the meter light voltage is picked up from and what is the bulb/lamp voltage?
If I can get this information ahead of time, I can get some LED's ready so we can pull out the amp, install the LED's and back together again.
Thanks and 73, Bob? W4JFA
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Does anyone verify the meter lamp voltage? I've spent a lot of time on google with no information on the voltage or replacement lamp part numbers. It looks like what Lou said it may be 12 volts but I sure would like to verify this before I get started on it.
Lou, I see 12 volts supply to the meter board?but even that diagram I have does not show the lamps. Bob
Lou, 12 volts? Thanks Bob? W4JFA
On Tue, Jan 9, 2024 at 10:42?AM Louis Parascondola via <Gudguyham= [email protected]> wrote:
Bob, the meter lamps are on the top of each meter.? It’s a plastic removable plate (small) that lifts out with the bulb.? The bulb runs off the control circuitry voltage.? Lou
On Tuesday, January 9, 2024, 10:11 AM, Bob <W4JFABob@...> wrote: Hi all, Just an update, we got the fan job done in my friends AL-80B amp. All is well.
I never noticed that the neither?of the meter lights work. The amp is already? put in it's place so it is a small "project" to get it out. Anyway, the schematic?that I found on line does not show the meter lights and unless I missed it, it doesn't list lights on the parts list either.
Does anyone know where the meter light voltage is picked up from and what is the bulb/lamp voltage?
If I can get this information ahead of time, I can get some LED's ready so we can pull out the amp, install the LED's and back together again.
Thanks and 73, Bob? W4JFA
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The 12v rail is usually around 15 volts so the usually have dropping resistors just outside the meter where the bulb fits in. ?Measure the voltage before the dropping resistor and use a 12v bulb that fits and use whatever drop resistor you need.
On Tuesday, January 9, 2024, 10:52 AM, Bob <W4JFABob@...> wrote: Lou, 12 volts? Thanks Bob? W4JFA On Tue, Jan 9, 2024 at 10:42?AM Louis Parascondola via <Gudguyham= [email protected]> wrote:
Bob, the meter lamps are on the top of each meter.? It’s a plastic removable plate (small) that lifts out with the bulb.? The bulb runs off the control circuitry voltage.? Lou
On Tuesday, January 9, 2024, 10:11 AM, Bob <W4JFABob@...> wrote: Hi all, Just an update, we got the fan job done in my friends AL-80B amp. All is well.
I never noticed that the neither?of the meter lights work. The amp is already? put in it's place so it is a small "project" to get it out. Anyway, the schematic?that I found on line does not show the meter lights and unless I missed it, it doesn't list lights on the parts list either.
Does anyone know where the meter light voltage is picked up from and what is the bulb/lamp voltage?
If I can get this information ahead of time, I can get some LED's ready so we can pull out the amp, install the LED's and back together again.
Thanks and 73, Bob? W4JFA
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Got it. Thanks. My friend called MFJ. They told him they are LED's. I gotta feeling they may have been incandescents in the early years then changed to LED"s at one time? Just guessing. He ordered a couple so I'll either use those or make him something. Thanks Lou.
On Tue, Jan 9, 2024, 4:28 PM Louis Parascondola via <Gudguyham= [email protected]> wrote:
The 12v rail is usually around 15 volts so the usually have dropping resistors just outside the meter where the bulb fits in.? Measure the voltage before the dropping resistor and use a 12v bulb that fits and use whatever drop resistor you need.
On Tuesday, January 9, 2024, 10:52 AM, Bob <W4JFABob@...> wrote: Lou, 12 volts? Thanks Bob? W4JFA On Tue, Jan 9, 2024 at 10:42?AM Louis Parascondola via <Gudguyham= [email protected]> wrote:
Bob, the meter lamps are on the top of each meter.? It’s a plastic removable plate (small) that lifts out with the bulb.? The bulb runs off the control circuitry voltage.? Lou
On Tuesday, January 9, 2024, 10:11 AM, Bob <W4JFABob@...> wrote: Hi all, Just an update, we got the fan job done in my friends AL-80B amp. All is well.
I never noticed that the neither?of the meter lights work. The amp is already? put in it's place so it is a small "project" to get it out. Anyway, the schematic?that I found on line does not show the meter lights and unless I missed it, it doesn't list lights on the parts list either.
Does anyone know where the meter light voltage is picked up from and what is the bulb/lamp voltage?
If I can get this information ahead of time, I can get some LED's ready so we can pull out the amp, install the LED's and back together again.
Thanks and 73, Bob? W4JFA
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Bob