You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

I've known about the 13N10's for a while now, but if you run them in a SSB radio, the AM pass regulator circuit will need to be modified to withstand the extra current draw from the 13N10's. This is very critical in the older Galaxy radios, like 33/44/55/66/73/77/88/99 boards where the audio path for SSB runs thru the AM pass regulator. On the regular AM radios, like the 29, they use a modulation transformer, so it's usually not a problem. You could install one on a 148 and be ok, as long as you don't install an Asymmetric/NPC mod, since SSB audio takes a different path and does not go thru the AM pass regulator circuit. If you install any kind of a swing mod or compression mod, you'l have to modify the AM pass regulator circuit, or you'll smoke the pass regulator in short order.

If the OP decides to install the 13N10's in the 949/959's, the AM pass regulator circuit will need to be upgraded if running dual finals.

~Cheers~

<blockquote data-quote="ExitThirteen" data-source="post: 492775" data-attributes="member: 6878">I&#039;ve known about the 13N10&#039;s for a while now, but if you run them in a SSB radio, the AM pass regulator circuit will need to be modified to withstand the extra current draw from the 13N10&#039;s. This is very critical in the older Galaxy radios, like 33/44/55/66/73/77/88/99 boards where the audio path for SSB runs thru the AM pass regulator. On the regular AM radios, like the 29, they use a modulation transformer, so it&#039;s usually not a problem. You could install one on a 148 and be ok, as long as you don&#039;t install an Asymmetric/NPC mod, since SSB audio takes a different path and does not go thru the AM pass regulator circuit. If you install any kind of a swing mod or compression mod, you&#039;l have to modify the AM pass regulator circuit, or you&#039;ll smoke the pass regulator in short order.If the OP decides to install the 13N10&#039;s in the 949/959&#039;s, the AM pass regulator circuit will need to be upgraded if running dual finals.~Cheers~</blockquote>

[QUOTE="ExitThirteen, post: 492775, member: 6878"] I've known about the 13N10's for a while now, but if you run them in a SSB radio, the AM pass regulator circuit will need to be modified to withstand the extra current draw from the 13N10's. This is very critical in the older Galaxy radios, like 33/44/55/66/73/77/88/99 boards where the audio path for SSB runs thru the AM pass regulator. On the regular AM radios, like the 29, they use a modulation transformer, so it's usually not a problem. You could install one on a 148 and be ok, as long as you don't install an Asymmetric/NPC mod, since SSB audio takes a different path and does not go thru the AM pass regulator circuit. If you install any kind of a swing mod or compression mod, you'l have to modify the AM pass regulator circuit, or you'll smoke the pass regulator in short order. If the OP decides to install the 13N10's in the 949/959's, the AM pass regulator circuit will need to be upgraded if running dual finals. ~Cheers~ [/QUOTE]

Top Bottom